Bug 568879: [Build] add spotbugs support

Change-Id: Ib0969addcdb1ea827acc725dc8dca9647b2770f1
diff --git a/plugins/org.eclipse.skills.dependencies/.project b/plugins/org.eclipse.skills.dependencies/.project
index 432f87b..c5eb1db 100644
--- a/plugins/org.eclipse.skills.dependencies/.project
+++ b/plugins/org.eclipse.skills.dependencies/.project
@@ -25,10 +25,16 @@
 			<arguments>
 			</arguments>
 		</buildCommand>
+		<buildCommand>
+			<name>edu.umd.cs.findbugs.plugin.eclipse.findbugsBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
 	</buildSpec>
 	<natures>
 		<nature>org.eclipse.pde.PluginNature</nature>
 		<nature>org.eclipse.jdt.core.javanature</nature>
 		<nature>ch.acanda.eclipse.pmd.builder.PMDNature</nature>
+		<nature>edu.umd.cs.findbugs.plugin.eclipse.findbugsNature</nature>
 	</natures>
 </projectDescription>
diff --git a/plugins/org.eclipse.skills.dependencies/.settings/com.github.spotbugs.plugin.eclipse.prefs b/plugins/org.eclipse.skills.dependencies/.settings/com.github.spotbugs.plugin.eclipse.prefs
new file mode 100644
index 0000000..925c680
--- /dev/null
+++ b/plugins/org.eclipse.skills.dependencies/.settings/com.github.spotbugs.plugin.eclipse.prefs
@@ -0,0 +1,2 @@
+dontRemindAboutFullBuild=true
+eclipse.preferences.version=1
diff --git a/plugins/org.eclipse.skills.dependencies/.settings/edu.umd.cs.findbugs.core.prefs b/plugins/org.eclipse.skills.dependencies/.settings/edu.umd.cs.findbugs.core.prefs
new file mode 100644
index 0000000..af79dad
--- /dev/null
+++ b/plugins/org.eclipse.skills.dependencies/.settings/edu.umd.cs.findbugs.core.prefs
@@ -0,0 +1,144 @@
+#SpotBugs User Preferences
+#Tue Nov 24 10:38:47 CET 2020
+detectorExplicitSerialization=ExplicitSerialization|true
+detectorMultithreadedInstanceAccess=MultithreadedInstanceAccess|true
+detectorConfusionBetweenInheritedAndOuterMethod=ConfusionBetweenInheritedAndOuterMethod|true
+detectorWrongMapIterator=WrongMapIterator|true
+detectorUnnecessaryMath=UnnecessaryMath|true
+detectorUselessSubclassMethod=UselessSubclassMethod|false
+filter_settings=Low|BAD_PRACTICE,CORRECTNESS,EXPERIMENTAL,I18N,MALICIOUS_CODE,MT_CORRECTNESS,PERFORMANCE,SECURITY,STYLE|false|20
+detectorURLProblems=URLProblems|true
+detectorIteratorIdioms=IteratorIdioms|true
+detectorMutableEnum=MutableEnum|true
+detectorFindNonShortCircuit=FindNonShortCircuit|true
+detectorSynchronizeAndNullCheckField=SynchronizeAndNullCheckField|true
+detectorVolatileUsage=VolatileUsage|true
+detectorFindNakedNotify=FindNakedNotify|true
+detectorFindUninitializedGet=FindUninitializedGet|true
+detectorFindUseOfNonSerializableValue=FindUseOfNonSerializableValue|true
+detectorFindJSR166LockMonitorenter=FindJSR166LockMonitorenter|true
+detectorQuestionableBooleanAssignment=QuestionableBooleanAssignment|true
+detectorSwitchFallthrough=SwitchFallthrough|true
+detectorFindLocalSelfAssignment2=FindLocalSelfAssignment2|true
+detectorConfusedInheritance=ConfusedInheritance|true
+detectorSynchronizationOnSharedBuiltinConstant=SynchronizationOnSharedBuiltinConstant|true
+detectorMutableStaticFields=MutableStaticFields|true
+detectorInvalidJUnitTest=InvalidJUnitTest|true
+detectorInfiniteLoop=InfiniteLoop|true
+detectorFindRunInvocations=FindRunInvocations|true
+detectorBadSyntaxForRegularExpression=BadSyntaxForRegularExpression|true
+detectorXMLFactoryBypass=XMLFactoryBypass|true
+detectorFindOpenStream=FindOpenStream|true
+detectorCheckExpectedWarnings=CheckExpectedWarnings|false
+detectorHugeSharedStringConstants=HugeSharedStringConstants|true
+detectorLostLoggerDueToWeakReference=LostLoggerDueToWeakReference|true
+detectorStringConcatenation=StringConcatenation|true
+detectorLoadOfKnownNullValue=LoadOfKnownNullValue|true
+detectorFinalizerNullsFields=FinalizerNullsFields|true
+detectorFindFieldSelfAssignment=FindFieldSelfAssignment|true
+detectorInefficientToArray=InefficientToArray|false
+detectorDontCatchIllegalMonitorStateException=DontCatchIllegalMonitorStateException|true
+detectorInconsistentAnnotations=InconsistentAnnotations|true
+detectorBadlyOverriddenAdapter=BadlyOverriddenAdapter|true
+detectorInstantiateStaticClass=InstantiateStaticClass|true
+detectorCheckRelaxingNullnessAnnotation=CheckRelaxingNullnessAnnotation|true
+detectorMethodReturnCheck=MethodReturnCheck|true
+detectorEqualsOperandShouldHaveClassCompatibleWithThis=EqualsOperandShouldHaveClassCompatibleWithThis|true
+detectorFindDoubleCheck=FindDoubleCheck|true
+detectorFindBadForLoop=FindBadForLoop|true
+detectorDefaultEncodingDetector=DefaultEncodingDetector|true
+detectorFindInconsistentSync2=FindInconsistentSync2|true
+detectorFindSpinLoop=FindSpinLoop|true
+detectorFindMaskedFields=FindMaskedFields|true
+detectorBooleanReturnNull=BooleanReturnNull|true
+detectorFindUnsyncGet=FindUnsyncGet|true
+detectorCrossSiteScripting=CrossSiteScripting|true
+detectorDroppedException=DroppedException|true
+detectorFindDeadLocalStores=FindDeadLocalStores|true
+detectorCheckImmutableAnnotation=CheckImmutableAnnotation|true
+detectorInfiniteRecursiveLoop=InfiniteRecursiveLoop|true
+detectorFindRefComparison=FindRefComparison|true
+detectorFindRoughConstants=FindRoughConstants|true
+detectorMutableLock=MutableLock|true
+detectorFindNullDeref=FindNullDeref|true
+detectorFindReturnRef=FindReturnRef|true
+detectorSynchronizeOnClassLiteralNotGetClass=SynchronizeOnClassLiteralNotGetClass|true
+detectorFindUselessControlFlow=FindUselessControlFlow|true
+detectorOverridingEqualsNotSymmetrical=OverridingEqualsNotSymmetrical|true
+detectorIDivResultCastToDouble=IDivResultCastToDouble|true
+detectorReadOfInstanceFieldInMethodInvokedByConstructorInSuperclass=ReadOfInstanceFieldInMethodInvokedByConstructorInSuperclass|true
+detectorFindSelfComparison=FindSelfComparison|true
+detectorFindFloatEquality=FindFloatEquality|true
+detectorFindComparatorProblems=FindComparatorProblems|true
+detectorRepeatedConditionals=RepeatedConditionals|true
+filter_settings_neg=NOISE|
+detectorInefficientMemberAccess=InefficientMemberAccess|false
+detectorFindUncalledPrivateMethods=FindUncalledPrivateMethods|true
+detectorNumberConstructor=NumberConstructor|true
+detectorDontAssertInstanceofInTests=DontAssertInstanceofInTests|true
+detectorFindFinalizeInvocations=FindFinalizeInvocations|true
+detectorFindNullDerefsInvolvingNonShortCircuitEvaluation=FindNullDerefsInvolvingNonShortCircuitEvaluation|true
+detectorDontIgnoreResultOfPutIfAbsent=DontIgnoreResultOfPutIfAbsent|true
+detectorFindUnconditionalWait=FindUnconditionalWait|true
+detectorFindTwoLockWait=FindTwoLockWait|true
+detectorFindSleepWithLockHeld=FindSleepWithLockHeld|true
+detectorFindUnreleasedLock=FindUnreleasedLock|true
+detectorInefficientIndexOf=InefficientIndexOf|false
+detectorDoInsideDoPrivileged=DoInsideDoPrivileged|true
+detectorFindEmptySynchronizedBlock=FindEmptySynchronizedBlock|true
+detectorOverridingMethodsMustInvokeSuperDetector=OverridingMethodsMustInvokeSuperDetector|true
+detectorWaitInLoop=WaitInLoop|true
+detectorIntCast2LongAsInstant=IntCast2LongAsInstant|true
+detectorBadUseOfReturnValue=BadUseOfReturnValue|true
+detectorFindSqlInjection=FindSqlInjection|true
+detectorUnreadFields=UnreadFields|true
+detectorSynchronizingOnContentsOfFieldToProtectField=SynchronizingOnContentsOfFieldToProtectField|true
+detectorFindUselessObjects=FindUselessObjects|true
+detectorBadAppletConstructor=BadAppletConstructor|false
+detectorInheritanceUnsafeGetResource=InheritanceUnsafeGetResource|true
+detectorSerializableIdiom=SerializableIdiom|true
+detectorNaming=Naming|true
+detectorNoteUnconditionalParamDerefs=NoteUnconditionalParamDerefs|true
+detectorFormatStringChecker=FormatStringChecker|true
+detectorSuspiciousThreadInterrupted=SuspiciousThreadInterrupted|true
+detectorEmptyZipFileEntry=EmptyZipFileEntry|false
+detectorFindCircularDependencies=FindCircularDependencies|false
+detectorPreferZeroLengthArrays=PreferZeroLengthArrays|true
+detectorAtomicityProblem=AtomicityProblem|true
+detectorRuntimeExceptionCapture=RuntimeExceptionCapture|true
+detectorInitializationChain=InitializationChain|true
+detectorInitializeNonnullFieldsInConstructor=InitializeNonnullFieldsInConstructor|true
+detectorOptionalReturnNull=OptionalReturnNull|true
+detectorStartInConstructor=StartInConstructor|true
+detectorFindUnsatisfiedObligation=FindUnsatisfiedObligation|true
+detectorRedundantConditions=RedundantConditions|true
+effort=max
+detectorRedundantInterfaces=RedundantInterfaces|true
+detectorDuplicateBranches=DuplicateBranches|true
+detectorCheckTypeQualifiers=CheckTypeQualifiers|true
+detectorComparatorIdiom=ComparatorIdiom|true
+detectorFindBadCast2=FindBadCast2|true
+detectorFindMismatchedWaitOrNotify=FindMismatchedWaitOrNotify|true
+detectorBadResultSetAccess=BadResultSetAccess|true
+detectorIncompatMask=IncompatMask|true
+detectorCovariantArrayAssignment=CovariantArrayAssignment|false
+detectorDumbMethodInvocations=DumbMethodInvocations|true
+run_at_full_build=true
+detectorStaticCalendarDetector=StaticCalendarDetector|true
+detectorUncallableMethodOfAnonymousClass=UncallableMethodOfAnonymousClass|true
+detectorVarArgsProblems=VarArgsProblems|true
+detectorInefficientInitializationInsideLoop=InefficientInitializationInsideLoop|false
+detectorCloneIdiom=CloneIdiom|true
+detectorFindHEmismatch=FindHEmismatch|true
+detectorAppendingToAnObjectOutputStream=AppendingToAnObjectOutputStream|true
+detectorFindSelfComparison2=FindSelfComparison2|true
+detectorLazyInit=LazyInit|true
+detectorFindUnrelatedTypesInGenericContainer=FindUnrelatedTypesInGenericContainer|true
+detectorDontUseEnum=DontUseEnum|true
+detectorFindPuzzlers=FindPuzzlers|true
+detectorCallToUnsupportedMethod=CallToUnsupportedMethod|false
+detectorSuperfluousInstanceOf=SuperfluousInstanceOf|true
+detectorReadReturnShouldBeChecked=ReadReturnShouldBeChecked|true
+detector_threshold=3
+detectorPublicSemaphores=PublicSemaphores|false
+detectorDumbMethods=DumbMethods|true
diff --git a/plugins/org.eclipse.skills.ui.questeditor/.project b/plugins/org.eclipse.skills.ui.questeditor/.project
index 07d642b..7e831bb 100644
--- a/plugins/org.eclipse.skills.ui.questeditor/.project
+++ b/plugins/org.eclipse.skills.ui.questeditor/.project
@@ -30,10 +30,16 @@
 			<arguments>
 			</arguments>
 		</buildCommand>
+		<buildCommand>
+			<name>edu.umd.cs.findbugs.plugin.eclipse.findbugsBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
 	</buildSpec>
 	<natures>
 		<nature>org.eclipse.pde.PluginNature</nature>
 		<nature>org.eclipse.jdt.core.javanature</nature>
 		<nature>ch.acanda.eclipse.pmd.builder.PMDNature</nature>
+		<nature>edu.umd.cs.findbugs.plugin.eclipse.findbugsNature</nature>
 	</natures>
 </projectDescription>
diff --git a/plugins/org.eclipse.skills.ui.questeditor/.settings/com.github.spotbugs.plugin.eclipse.prefs b/plugins/org.eclipse.skills.ui.questeditor/.settings/com.github.spotbugs.plugin.eclipse.prefs
new file mode 100644
index 0000000..925c680
--- /dev/null
+++ b/plugins/org.eclipse.skills.ui.questeditor/.settings/com.github.spotbugs.plugin.eclipse.prefs
@@ -0,0 +1,2 @@
+dontRemindAboutFullBuild=true
+eclipse.preferences.version=1
diff --git a/plugins/org.eclipse.skills.ui.questeditor/.settings/edu.umd.cs.findbugs.core.prefs b/plugins/org.eclipse.skills.ui.questeditor/.settings/edu.umd.cs.findbugs.core.prefs
new file mode 100644
index 0000000..af79dad
--- /dev/null
+++ b/plugins/org.eclipse.skills.ui.questeditor/.settings/edu.umd.cs.findbugs.core.prefs
@@ -0,0 +1,144 @@
+#SpotBugs User Preferences
+#Tue Nov 24 10:38:47 CET 2020
+detectorExplicitSerialization=ExplicitSerialization|true
+detectorMultithreadedInstanceAccess=MultithreadedInstanceAccess|true
+detectorConfusionBetweenInheritedAndOuterMethod=ConfusionBetweenInheritedAndOuterMethod|true
+detectorWrongMapIterator=WrongMapIterator|true
+detectorUnnecessaryMath=UnnecessaryMath|true
+detectorUselessSubclassMethod=UselessSubclassMethod|false
+filter_settings=Low|BAD_PRACTICE,CORRECTNESS,EXPERIMENTAL,I18N,MALICIOUS_CODE,MT_CORRECTNESS,PERFORMANCE,SECURITY,STYLE|false|20
+detectorURLProblems=URLProblems|true
+detectorIteratorIdioms=IteratorIdioms|true
+detectorMutableEnum=MutableEnum|true
+detectorFindNonShortCircuit=FindNonShortCircuit|true
+detectorSynchronizeAndNullCheckField=SynchronizeAndNullCheckField|true
+detectorVolatileUsage=VolatileUsage|true
+detectorFindNakedNotify=FindNakedNotify|true
+detectorFindUninitializedGet=FindUninitializedGet|true
+detectorFindUseOfNonSerializableValue=FindUseOfNonSerializableValue|true
+detectorFindJSR166LockMonitorenter=FindJSR166LockMonitorenter|true
+detectorQuestionableBooleanAssignment=QuestionableBooleanAssignment|true
+detectorSwitchFallthrough=SwitchFallthrough|true
+detectorFindLocalSelfAssignment2=FindLocalSelfAssignment2|true
+detectorConfusedInheritance=ConfusedInheritance|true
+detectorSynchronizationOnSharedBuiltinConstant=SynchronizationOnSharedBuiltinConstant|true
+detectorMutableStaticFields=MutableStaticFields|true
+detectorInvalidJUnitTest=InvalidJUnitTest|true
+detectorInfiniteLoop=InfiniteLoop|true
+detectorFindRunInvocations=FindRunInvocations|true
+detectorBadSyntaxForRegularExpression=BadSyntaxForRegularExpression|true
+detectorXMLFactoryBypass=XMLFactoryBypass|true
+detectorFindOpenStream=FindOpenStream|true
+detectorCheckExpectedWarnings=CheckExpectedWarnings|false
+detectorHugeSharedStringConstants=HugeSharedStringConstants|true
+detectorLostLoggerDueToWeakReference=LostLoggerDueToWeakReference|true
+detectorStringConcatenation=StringConcatenation|true
+detectorLoadOfKnownNullValue=LoadOfKnownNullValue|true
+detectorFinalizerNullsFields=FinalizerNullsFields|true
+detectorFindFieldSelfAssignment=FindFieldSelfAssignment|true
+detectorInefficientToArray=InefficientToArray|false
+detectorDontCatchIllegalMonitorStateException=DontCatchIllegalMonitorStateException|true
+detectorInconsistentAnnotations=InconsistentAnnotations|true
+detectorBadlyOverriddenAdapter=BadlyOverriddenAdapter|true
+detectorInstantiateStaticClass=InstantiateStaticClass|true
+detectorCheckRelaxingNullnessAnnotation=CheckRelaxingNullnessAnnotation|true
+detectorMethodReturnCheck=MethodReturnCheck|true
+detectorEqualsOperandShouldHaveClassCompatibleWithThis=EqualsOperandShouldHaveClassCompatibleWithThis|true
+detectorFindDoubleCheck=FindDoubleCheck|true
+detectorFindBadForLoop=FindBadForLoop|true
+detectorDefaultEncodingDetector=DefaultEncodingDetector|true
+detectorFindInconsistentSync2=FindInconsistentSync2|true
+detectorFindSpinLoop=FindSpinLoop|true
+detectorFindMaskedFields=FindMaskedFields|true
+detectorBooleanReturnNull=BooleanReturnNull|true
+detectorFindUnsyncGet=FindUnsyncGet|true
+detectorCrossSiteScripting=CrossSiteScripting|true
+detectorDroppedException=DroppedException|true
+detectorFindDeadLocalStores=FindDeadLocalStores|true
+detectorCheckImmutableAnnotation=CheckImmutableAnnotation|true
+detectorInfiniteRecursiveLoop=InfiniteRecursiveLoop|true
+detectorFindRefComparison=FindRefComparison|true
+detectorFindRoughConstants=FindRoughConstants|true
+detectorMutableLock=MutableLock|true
+detectorFindNullDeref=FindNullDeref|true
+detectorFindReturnRef=FindReturnRef|true
+detectorSynchronizeOnClassLiteralNotGetClass=SynchronizeOnClassLiteralNotGetClass|true
+detectorFindUselessControlFlow=FindUselessControlFlow|true
+detectorOverridingEqualsNotSymmetrical=OverridingEqualsNotSymmetrical|true
+detectorIDivResultCastToDouble=IDivResultCastToDouble|true
+detectorReadOfInstanceFieldInMethodInvokedByConstructorInSuperclass=ReadOfInstanceFieldInMethodInvokedByConstructorInSuperclass|true
+detectorFindSelfComparison=FindSelfComparison|true
+detectorFindFloatEquality=FindFloatEquality|true
+detectorFindComparatorProblems=FindComparatorProblems|true
+detectorRepeatedConditionals=RepeatedConditionals|true
+filter_settings_neg=NOISE|
+detectorInefficientMemberAccess=InefficientMemberAccess|false
+detectorFindUncalledPrivateMethods=FindUncalledPrivateMethods|true
+detectorNumberConstructor=NumberConstructor|true
+detectorDontAssertInstanceofInTests=DontAssertInstanceofInTests|true
+detectorFindFinalizeInvocations=FindFinalizeInvocations|true
+detectorFindNullDerefsInvolvingNonShortCircuitEvaluation=FindNullDerefsInvolvingNonShortCircuitEvaluation|true
+detectorDontIgnoreResultOfPutIfAbsent=DontIgnoreResultOfPutIfAbsent|true
+detectorFindUnconditionalWait=FindUnconditionalWait|true
+detectorFindTwoLockWait=FindTwoLockWait|true
+detectorFindSleepWithLockHeld=FindSleepWithLockHeld|true
+detectorFindUnreleasedLock=FindUnreleasedLock|true
+detectorInefficientIndexOf=InefficientIndexOf|false
+detectorDoInsideDoPrivileged=DoInsideDoPrivileged|true
+detectorFindEmptySynchronizedBlock=FindEmptySynchronizedBlock|true
+detectorOverridingMethodsMustInvokeSuperDetector=OverridingMethodsMustInvokeSuperDetector|true
+detectorWaitInLoop=WaitInLoop|true
+detectorIntCast2LongAsInstant=IntCast2LongAsInstant|true
+detectorBadUseOfReturnValue=BadUseOfReturnValue|true
+detectorFindSqlInjection=FindSqlInjection|true
+detectorUnreadFields=UnreadFields|true
+detectorSynchronizingOnContentsOfFieldToProtectField=SynchronizingOnContentsOfFieldToProtectField|true
+detectorFindUselessObjects=FindUselessObjects|true
+detectorBadAppletConstructor=BadAppletConstructor|false
+detectorInheritanceUnsafeGetResource=InheritanceUnsafeGetResource|true
+detectorSerializableIdiom=SerializableIdiom|true
+detectorNaming=Naming|true
+detectorNoteUnconditionalParamDerefs=NoteUnconditionalParamDerefs|true
+detectorFormatStringChecker=FormatStringChecker|true
+detectorSuspiciousThreadInterrupted=SuspiciousThreadInterrupted|true
+detectorEmptyZipFileEntry=EmptyZipFileEntry|false
+detectorFindCircularDependencies=FindCircularDependencies|false
+detectorPreferZeroLengthArrays=PreferZeroLengthArrays|true
+detectorAtomicityProblem=AtomicityProblem|true
+detectorRuntimeExceptionCapture=RuntimeExceptionCapture|true
+detectorInitializationChain=InitializationChain|true
+detectorInitializeNonnullFieldsInConstructor=InitializeNonnullFieldsInConstructor|true
+detectorOptionalReturnNull=OptionalReturnNull|true
+detectorStartInConstructor=StartInConstructor|true
+detectorFindUnsatisfiedObligation=FindUnsatisfiedObligation|true
+detectorRedundantConditions=RedundantConditions|true
+effort=max
+detectorRedundantInterfaces=RedundantInterfaces|true
+detectorDuplicateBranches=DuplicateBranches|true
+detectorCheckTypeQualifiers=CheckTypeQualifiers|true
+detectorComparatorIdiom=ComparatorIdiom|true
+detectorFindBadCast2=FindBadCast2|true
+detectorFindMismatchedWaitOrNotify=FindMismatchedWaitOrNotify|true
+detectorBadResultSetAccess=BadResultSetAccess|true
+detectorIncompatMask=IncompatMask|true
+detectorCovariantArrayAssignment=CovariantArrayAssignment|false
+detectorDumbMethodInvocations=DumbMethodInvocations|true
+run_at_full_build=true
+detectorStaticCalendarDetector=StaticCalendarDetector|true
+detectorUncallableMethodOfAnonymousClass=UncallableMethodOfAnonymousClass|true
+detectorVarArgsProblems=VarArgsProblems|true
+detectorInefficientInitializationInsideLoop=InefficientInitializationInsideLoop|false
+detectorCloneIdiom=CloneIdiom|true
+detectorFindHEmismatch=FindHEmismatch|true
+detectorAppendingToAnObjectOutputStream=AppendingToAnObjectOutputStream|true
+detectorFindSelfComparison2=FindSelfComparison2|true
+detectorLazyInit=LazyInit|true
+detectorFindUnrelatedTypesInGenericContainer=FindUnrelatedTypesInGenericContainer|true
+detectorDontUseEnum=DontUseEnum|true
+detectorFindPuzzlers=FindPuzzlers|true
+detectorCallToUnsupportedMethod=CallToUnsupportedMethod|false
+detectorSuperfluousInstanceOf=SuperfluousInstanceOf|true
+detectorReadReturnShouldBeChecked=ReadReturnShouldBeChecked|true
+detector_threshold=3
+detectorPublicSemaphores=PublicSemaphores|false
+detectorDumbMethods=DumbMethods|true
diff --git a/plugins/org.eclipse.skills/.project b/plugins/org.eclipse.skills/.project
index 0fe971a..7bea1a4 100644
--- a/plugins/org.eclipse.skills/.project
+++ b/plugins/org.eclipse.skills/.project
@@ -25,11 +25,17 @@
 			<arguments>

 			</arguments>

 		</buildCommand>

+		<buildCommand>

+			<name>edu.umd.cs.findbugs.plugin.eclipse.findbugsBuilder</name>

+			<arguments>

+			</arguments>

+		</buildCommand>

 	</buildSpec>

 	<natures>

 		<nature>org.eclipse.sirius.nature.modelingproject</nature>

 		<nature>org.eclipse.jdt.core.javanature</nature>

 		<nature>org.eclipse.pde.PluginNature</nature>

 		<nature>ch.acanda.eclipse.pmd.builder.PMDNature</nature>

+		<nature>edu.umd.cs.findbugs.plugin.eclipse.findbugsNature</nature>

 	</natures>

 </projectDescription>

diff --git a/plugins/org.eclipse.skills/.settings/com.github.spotbugs.plugin.eclipse.prefs b/plugins/org.eclipse.skills/.settings/com.github.spotbugs.plugin.eclipse.prefs
new file mode 100644
index 0000000..925c680
--- /dev/null
+++ b/plugins/org.eclipse.skills/.settings/com.github.spotbugs.plugin.eclipse.prefs
@@ -0,0 +1,2 @@
+dontRemindAboutFullBuild=true
+eclipse.preferences.version=1
diff --git a/plugins/org.eclipse.skills/.settings/edu.umd.cs.findbugs.core.prefs b/plugins/org.eclipse.skills/.settings/edu.umd.cs.findbugs.core.prefs
new file mode 100644
index 0000000..af79dad
--- /dev/null
+++ b/plugins/org.eclipse.skills/.settings/edu.umd.cs.findbugs.core.prefs
@@ -0,0 +1,144 @@
+#SpotBugs User Preferences
+#Tue Nov 24 10:38:47 CET 2020
+detectorExplicitSerialization=ExplicitSerialization|true
+detectorMultithreadedInstanceAccess=MultithreadedInstanceAccess|true
+detectorConfusionBetweenInheritedAndOuterMethod=ConfusionBetweenInheritedAndOuterMethod|true
+detectorWrongMapIterator=WrongMapIterator|true
+detectorUnnecessaryMath=UnnecessaryMath|true
+detectorUselessSubclassMethod=UselessSubclassMethod|false
+filter_settings=Low|BAD_PRACTICE,CORRECTNESS,EXPERIMENTAL,I18N,MALICIOUS_CODE,MT_CORRECTNESS,PERFORMANCE,SECURITY,STYLE|false|20
+detectorURLProblems=URLProblems|true
+detectorIteratorIdioms=IteratorIdioms|true
+detectorMutableEnum=MutableEnum|true
+detectorFindNonShortCircuit=FindNonShortCircuit|true
+detectorSynchronizeAndNullCheckField=SynchronizeAndNullCheckField|true
+detectorVolatileUsage=VolatileUsage|true
+detectorFindNakedNotify=FindNakedNotify|true
+detectorFindUninitializedGet=FindUninitializedGet|true
+detectorFindUseOfNonSerializableValue=FindUseOfNonSerializableValue|true
+detectorFindJSR166LockMonitorenter=FindJSR166LockMonitorenter|true
+detectorQuestionableBooleanAssignment=QuestionableBooleanAssignment|true
+detectorSwitchFallthrough=SwitchFallthrough|true
+detectorFindLocalSelfAssignment2=FindLocalSelfAssignment2|true
+detectorConfusedInheritance=ConfusedInheritance|true
+detectorSynchronizationOnSharedBuiltinConstant=SynchronizationOnSharedBuiltinConstant|true
+detectorMutableStaticFields=MutableStaticFields|true
+detectorInvalidJUnitTest=InvalidJUnitTest|true
+detectorInfiniteLoop=InfiniteLoop|true
+detectorFindRunInvocations=FindRunInvocations|true
+detectorBadSyntaxForRegularExpression=BadSyntaxForRegularExpression|true
+detectorXMLFactoryBypass=XMLFactoryBypass|true
+detectorFindOpenStream=FindOpenStream|true
+detectorCheckExpectedWarnings=CheckExpectedWarnings|false
+detectorHugeSharedStringConstants=HugeSharedStringConstants|true
+detectorLostLoggerDueToWeakReference=LostLoggerDueToWeakReference|true
+detectorStringConcatenation=StringConcatenation|true
+detectorLoadOfKnownNullValue=LoadOfKnownNullValue|true
+detectorFinalizerNullsFields=FinalizerNullsFields|true
+detectorFindFieldSelfAssignment=FindFieldSelfAssignment|true
+detectorInefficientToArray=InefficientToArray|false
+detectorDontCatchIllegalMonitorStateException=DontCatchIllegalMonitorStateException|true
+detectorInconsistentAnnotations=InconsistentAnnotations|true
+detectorBadlyOverriddenAdapter=BadlyOverriddenAdapter|true
+detectorInstantiateStaticClass=InstantiateStaticClass|true
+detectorCheckRelaxingNullnessAnnotation=CheckRelaxingNullnessAnnotation|true
+detectorMethodReturnCheck=MethodReturnCheck|true
+detectorEqualsOperandShouldHaveClassCompatibleWithThis=EqualsOperandShouldHaveClassCompatibleWithThis|true
+detectorFindDoubleCheck=FindDoubleCheck|true
+detectorFindBadForLoop=FindBadForLoop|true
+detectorDefaultEncodingDetector=DefaultEncodingDetector|true
+detectorFindInconsistentSync2=FindInconsistentSync2|true
+detectorFindSpinLoop=FindSpinLoop|true
+detectorFindMaskedFields=FindMaskedFields|true
+detectorBooleanReturnNull=BooleanReturnNull|true
+detectorFindUnsyncGet=FindUnsyncGet|true
+detectorCrossSiteScripting=CrossSiteScripting|true
+detectorDroppedException=DroppedException|true
+detectorFindDeadLocalStores=FindDeadLocalStores|true
+detectorCheckImmutableAnnotation=CheckImmutableAnnotation|true
+detectorInfiniteRecursiveLoop=InfiniteRecursiveLoop|true
+detectorFindRefComparison=FindRefComparison|true
+detectorFindRoughConstants=FindRoughConstants|true
+detectorMutableLock=MutableLock|true
+detectorFindNullDeref=FindNullDeref|true
+detectorFindReturnRef=FindReturnRef|true
+detectorSynchronizeOnClassLiteralNotGetClass=SynchronizeOnClassLiteralNotGetClass|true
+detectorFindUselessControlFlow=FindUselessControlFlow|true
+detectorOverridingEqualsNotSymmetrical=OverridingEqualsNotSymmetrical|true
+detectorIDivResultCastToDouble=IDivResultCastToDouble|true
+detectorReadOfInstanceFieldInMethodInvokedByConstructorInSuperclass=ReadOfInstanceFieldInMethodInvokedByConstructorInSuperclass|true
+detectorFindSelfComparison=FindSelfComparison|true
+detectorFindFloatEquality=FindFloatEquality|true
+detectorFindComparatorProblems=FindComparatorProblems|true
+detectorRepeatedConditionals=RepeatedConditionals|true
+filter_settings_neg=NOISE|
+detectorInefficientMemberAccess=InefficientMemberAccess|false
+detectorFindUncalledPrivateMethods=FindUncalledPrivateMethods|true
+detectorNumberConstructor=NumberConstructor|true
+detectorDontAssertInstanceofInTests=DontAssertInstanceofInTests|true
+detectorFindFinalizeInvocations=FindFinalizeInvocations|true
+detectorFindNullDerefsInvolvingNonShortCircuitEvaluation=FindNullDerefsInvolvingNonShortCircuitEvaluation|true
+detectorDontIgnoreResultOfPutIfAbsent=DontIgnoreResultOfPutIfAbsent|true
+detectorFindUnconditionalWait=FindUnconditionalWait|true
+detectorFindTwoLockWait=FindTwoLockWait|true
+detectorFindSleepWithLockHeld=FindSleepWithLockHeld|true
+detectorFindUnreleasedLock=FindUnreleasedLock|true
+detectorInefficientIndexOf=InefficientIndexOf|false
+detectorDoInsideDoPrivileged=DoInsideDoPrivileged|true
+detectorFindEmptySynchronizedBlock=FindEmptySynchronizedBlock|true
+detectorOverridingMethodsMustInvokeSuperDetector=OverridingMethodsMustInvokeSuperDetector|true
+detectorWaitInLoop=WaitInLoop|true
+detectorIntCast2LongAsInstant=IntCast2LongAsInstant|true
+detectorBadUseOfReturnValue=BadUseOfReturnValue|true
+detectorFindSqlInjection=FindSqlInjection|true
+detectorUnreadFields=UnreadFields|true
+detectorSynchronizingOnContentsOfFieldToProtectField=SynchronizingOnContentsOfFieldToProtectField|true
+detectorFindUselessObjects=FindUselessObjects|true
+detectorBadAppletConstructor=BadAppletConstructor|false
+detectorInheritanceUnsafeGetResource=InheritanceUnsafeGetResource|true
+detectorSerializableIdiom=SerializableIdiom|true
+detectorNaming=Naming|true
+detectorNoteUnconditionalParamDerefs=NoteUnconditionalParamDerefs|true
+detectorFormatStringChecker=FormatStringChecker|true
+detectorSuspiciousThreadInterrupted=SuspiciousThreadInterrupted|true
+detectorEmptyZipFileEntry=EmptyZipFileEntry|false
+detectorFindCircularDependencies=FindCircularDependencies|false
+detectorPreferZeroLengthArrays=PreferZeroLengthArrays|true
+detectorAtomicityProblem=AtomicityProblem|true
+detectorRuntimeExceptionCapture=RuntimeExceptionCapture|true
+detectorInitializationChain=InitializationChain|true
+detectorInitializeNonnullFieldsInConstructor=InitializeNonnullFieldsInConstructor|true
+detectorOptionalReturnNull=OptionalReturnNull|true
+detectorStartInConstructor=StartInConstructor|true
+detectorFindUnsatisfiedObligation=FindUnsatisfiedObligation|true
+detectorRedundantConditions=RedundantConditions|true
+effort=max
+detectorRedundantInterfaces=RedundantInterfaces|true
+detectorDuplicateBranches=DuplicateBranches|true
+detectorCheckTypeQualifiers=CheckTypeQualifiers|true
+detectorComparatorIdiom=ComparatorIdiom|true
+detectorFindBadCast2=FindBadCast2|true
+detectorFindMismatchedWaitOrNotify=FindMismatchedWaitOrNotify|true
+detectorBadResultSetAccess=BadResultSetAccess|true
+detectorIncompatMask=IncompatMask|true
+detectorCovariantArrayAssignment=CovariantArrayAssignment|false
+detectorDumbMethodInvocations=DumbMethodInvocations|true
+run_at_full_build=true
+detectorStaticCalendarDetector=StaticCalendarDetector|true
+detectorUncallableMethodOfAnonymousClass=UncallableMethodOfAnonymousClass|true
+detectorVarArgsProblems=VarArgsProblems|true
+detectorInefficientInitializationInsideLoop=InefficientInitializationInsideLoop|false
+detectorCloneIdiom=CloneIdiom|true
+detectorFindHEmismatch=FindHEmismatch|true
+detectorAppendingToAnObjectOutputStream=AppendingToAnObjectOutputStream|true
+detectorFindSelfComparison2=FindSelfComparison2|true
+detectorLazyInit=LazyInit|true
+detectorFindUnrelatedTypesInGenericContainer=FindUnrelatedTypesInGenericContainer|true
+detectorDontUseEnum=DontUseEnum|true
+detectorFindPuzzlers=FindPuzzlers|true
+detectorCallToUnsupportedMethod=CallToUnsupportedMethod|false
+detectorSuperfluousInstanceOf=SuperfluousInstanceOf|true
+detectorReadReturnShouldBeChecked=ReadReturnShouldBeChecked|true
+detector_threshold=3
+detectorPublicSemaphores=PublicSemaphores|false
+detectorDumbMethods=DumbMethods|true
diff --git a/plugins/org.eclipse.skills/.findbugs-exclude.xml b/plugins/org.eclipse.skills/.settings/spotbugs-exclude.xml
similarity index 100%
rename from plugins/org.eclipse.skills/.findbugs-exclude.xml
rename to plugins/org.eclipse.skills/.settings/spotbugs-exclude.xml
diff --git a/plugins/org.eclipse.skills/pom.xml b/plugins/org.eclipse.skills/pom.xml
index 27d908b..780475c 100644
--- a/plugins/org.eclipse.skills/pom.xml
+++ b/plugins/org.eclipse.skills/pom.xml
@@ -19,21 +19,11 @@
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-checkstyle-plugin</artifactId>
 				<version>${maven.checkstyle.version}</version>
+
 				<configuration>
 					<excludes>**/org/eclipse/skills/model/**/*</excludes>
 				</configuration>
 			</plugin>
-			
-			<!-- remove generated resources from findbugs code analysis -->
-			<plugin>
-				<groupId>org.codehaus.mojo</groupId>
-				<artifactId>findbugs-maven-plugin</artifactId>
-				<version>${maven.findbugs.version}</version>
-				<configuration>
-					<excludeFilterFile>.findbugs-exclude.xml</excludeFilterFile>
-				</configuration>
-			</plugin>
-			
 		</plugins>
 	</build>
 
diff --git a/releng/org.eclipse.skills.releng/pom.xml b/releng/org.eclipse.skills.releng/pom.xml
index e269b49..9178212 100644
--- a/releng/org.eclipse.skills.releng/pom.xml
+++ b/releng/org.eclipse.skills.releng/pom.xml
@@ -17,8 +17,8 @@
 		<eclipse.jarsigner.version>1.1.3</eclipse.jarsigner.version>
 		<maven.buildhelper.version>1.9.1</maven.buildhelper.version>
 		<maven.pmd.version>3.13.0</maven.pmd.version>
+		<maven.spotbugs.version>4.1.4</maven.spotbugs.version>
 		<maven.checkstyle.version>3.1.1</maven.checkstyle.version>
-		<maven.findbugs.version>3.0.5</maven.findbugs.version>
 
 		<!-- build parameters -->
 		<compiler.compliance>1.8</compiler.compliance>
@@ -100,6 +100,29 @@
 				</configuration>
 			</plugin>
 
+			<!-- enable spotbugs code analysis -->
+			<plugin>
+				<groupId>com.github.spotbugs</groupId>
+				<artifactId>spotbugs-maven-plugin</artifactId>
+				<version>${maven.spotbugs.version}</version>
+
+				<configuration>
+					<effort>Max</effort>
+					<threshold>Low</threshold>
+					<fork>false</fork>
+				</configuration>
+
+				<executions>
+					<execution>
+						<id>spotbugs-integration</id>
+						<phase>verify</phase>
+						<goals>
+							<goal>spotbugs</goal>
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
+
 			<!-- enable JaCoCo code coverage -->
 			<plugin>
 				<groupId>org.jacoco</groupId>
@@ -107,17 +130,7 @@
 				<version>${jacoco.version}</version>
 
 				<configuration>
-				<!-- 
-					<includes>
-						<include>org.eclipse.skills.*</include>
-						<include>**/org/eclipse/skills/**/*</include>
-					</includes>
-				 -->
 					<output>file</output>
-					<append>true</append>
-					
-					<!-- <destFile>${jacoco.report.path}</destFile> -->
-					<!-- <outputDirectory>../../coverage-report</outputDirectory> -->
 				</configuration>
 
 				<executions>
@@ -142,13 +155,6 @@
 				</configuration>
 			</plugin>
 
-			<!-- enable findbugs code analysis -->
-			<plugin>
-				<groupId>org.codehaus.mojo</groupId>
-				<artifactId>findbugs-maven-plugin</artifactId>
-				<version>${maven.findbugs.version}</version>
-			</plugin>
-
 			<!-- enable tycho build extension -->
 			<plugin>
 				<groupId>org.eclipse.tycho</groupId>
@@ -306,6 +312,32 @@
 		</profile>
 
 		<profile>
+			<!-- apply filter when filter file exists -->
+			<id>auto-spotbugs-exclude</id>
+			<activation>
+				<file>
+					<exists>.settings/spotbugs-exclude.xml</exists>
+				</file>
+			</activation>
+
+
+			<build>
+				<plugins>
+					<!-- enable spotbugs exclude filter -->
+					<plugin>
+						<groupId>com.github.spotbugs</groupId>
+						<artifactId>spotbugs-maven-plugin</artifactId>
+						<version>${maven.spotbugs.version}</version>
+
+						<configuration>
+							<excludeFilterFile>.settings/spotbugs-exclude.xml</excludeFilterFile>
+						</configuration>
+					</plugin>
+				</plugins>
+			</build>
+		</profile>
+
+		<profile>
 			<id>sign</id>
 
 			<build>
diff --git a/tests/org.eclipse.skills.dependencies.test/.project b/tests/org.eclipse.skills.dependencies.test/.project
index ca9457d..15b286d 100644
--- a/tests/org.eclipse.skills.dependencies.test/.project
+++ b/tests/org.eclipse.skills.dependencies.test/.project
@@ -25,10 +25,16 @@
 			<arguments>
 			</arguments>
 		</buildCommand>
+		<buildCommand>
+			<name>edu.umd.cs.findbugs.plugin.eclipse.findbugsBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
 	</buildSpec>
 	<natures>
 		<nature>org.eclipse.pde.PluginNature</nature>
 		<nature>org.eclipse.jdt.core.javanature</nature>
 		<nature>ch.acanda.eclipse.pmd.builder.PMDNature</nature>
+		<nature>edu.umd.cs.findbugs.plugin.eclipse.findbugsNature</nature>
 	</natures>
 </projectDescription>
diff --git a/tests/org.eclipse.skills.dependencies.test/.settings/com.github.spotbugs.plugin.eclipse.prefs b/tests/org.eclipse.skills.dependencies.test/.settings/com.github.spotbugs.plugin.eclipse.prefs
new file mode 100644
index 0000000..925c680
--- /dev/null
+++ b/tests/org.eclipse.skills.dependencies.test/.settings/com.github.spotbugs.plugin.eclipse.prefs
@@ -0,0 +1,2 @@
+dontRemindAboutFullBuild=true
+eclipse.preferences.version=1
diff --git a/tests/org.eclipse.skills.dependencies.test/.settings/edu.umd.cs.findbugs.core.prefs b/tests/org.eclipse.skills.dependencies.test/.settings/edu.umd.cs.findbugs.core.prefs
new file mode 100644
index 0000000..af79dad
--- /dev/null
+++ b/tests/org.eclipse.skills.dependencies.test/.settings/edu.umd.cs.findbugs.core.prefs
@@ -0,0 +1,144 @@
+#SpotBugs User Preferences
+#Tue Nov 24 10:38:47 CET 2020
+detectorExplicitSerialization=ExplicitSerialization|true
+detectorMultithreadedInstanceAccess=MultithreadedInstanceAccess|true
+detectorConfusionBetweenInheritedAndOuterMethod=ConfusionBetweenInheritedAndOuterMethod|true
+detectorWrongMapIterator=WrongMapIterator|true
+detectorUnnecessaryMath=UnnecessaryMath|true
+detectorUselessSubclassMethod=UselessSubclassMethod|false
+filter_settings=Low|BAD_PRACTICE,CORRECTNESS,EXPERIMENTAL,I18N,MALICIOUS_CODE,MT_CORRECTNESS,PERFORMANCE,SECURITY,STYLE|false|20
+detectorURLProblems=URLProblems|true
+detectorIteratorIdioms=IteratorIdioms|true
+detectorMutableEnum=MutableEnum|true
+detectorFindNonShortCircuit=FindNonShortCircuit|true
+detectorSynchronizeAndNullCheckField=SynchronizeAndNullCheckField|true
+detectorVolatileUsage=VolatileUsage|true
+detectorFindNakedNotify=FindNakedNotify|true
+detectorFindUninitializedGet=FindUninitializedGet|true
+detectorFindUseOfNonSerializableValue=FindUseOfNonSerializableValue|true
+detectorFindJSR166LockMonitorenter=FindJSR166LockMonitorenter|true
+detectorQuestionableBooleanAssignment=QuestionableBooleanAssignment|true
+detectorSwitchFallthrough=SwitchFallthrough|true
+detectorFindLocalSelfAssignment2=FindLocalSelfAssignment2|true
+detectorConfusedInheritance=ConfusedInheritance|true
+detectorSynchronizationOnSharedBuiltinConstant=SynchronizationOnSharedBuiltinConstant|true
+detectorMutableStaticFields=MutableStaticFields|true
+detectorInvalidJUnitTest=InvalidJUnitTest|true
+detectorInfiniteLoop=InfiniteLoop|true
+detectorFindRunInvocations=FindRunInvocations|true
+detectorBadSyntaxForRegularExpression=BadSyntaxForRegularExpression|true
+detectorXMLFactoryBypass=XMLFactoryBypass|true
+detectorFindOpenStream=FindOpenStream|true
+detectorCheckExpectedWarnings=CheckExpectedWarnings|false
+detectorHugeSharedStringConstants=HugeSharedStringConstants|true
+detectorLostLoggerDueToWeakReference=LostLoggerDueToWeakReference|true
+detectorStringConcatenation=StringConcatenation|true
+detectorLoadOfKnownNullValue=LoadOfKnownNullValue|true
+detectorFinalizerNullsFields=FinalizerNullsFields|true
+detectorFindFieldSelfAssignment=FindFieldSelfAssignment|true
+detectorInefficientToArray=InefficientToArray|false
+detectorDontCatchIllegalMonitorStateException=DontCatchIllegalMonitorStateException|true
+detectorInconsistentAnnotations=InconsistentAnnotations|true
+detectorBadlyOverriddenAdapter=BadlyOverriddenAdapter|true
+detectorInstantiateStaticClass=InstantiateStaticClass|true
+detectorCheckRelaxingNullnessAnnotation=CheckRelaxingNullnessAnnotation|true
+detectorMethodReturnCheck=MethodReturnCheck|true
+detectorEqualsOperandShouldHaveClassCompatibleWithThis=EqualsOperandShouldHaveClassCompatibleWithThis|true
+detectorFindDoubleCheck=FindDoubleCheck|true
+detectorFindBadForLoop=FindBadForLoop|true
+detectorDefaultEncodingDetector=DefaultEncodingDetector|true
+detectorFindInconsistentSync2=FindInconsistentSync2|true
+detectorFindSpinLoop=FindSpinLoop|true
+detectorFindMaskedFields=FindMaskedFields|true
+detectorBooleanReturnNull=BooleanReturnNull|true
+detectorFindUnsyncGet=FindUnsyncGet|true
+detectorCrossSiteScripting=CrossSiteScripting|true
+detectorDroppedException=DroppedException|true
+detectorFindDeadLocalStores=FindDeadLocalStores|true
+detectorCheckImmutableAnnotation=CheckImmutableAnnotation|true
+detectorInfiniteRecursiveLoop=InfiniteRecursiveLoop|true
+detectorFindRefComparison=FindRefComparison|true
+detectorFindRoughConstants=FindRoughConstants|true
+detectorMutableLock=MutableLock|true
+detectorFindNullDeref=FindNullDeref|true
+detectorFindReturnRef=FindReturnRef|true
+detectorSynchronizeOnClassLiteralNotGetClass=SynchronizeOnClassLiteralNotGetClass|true
+detectorFindUselessControlFlow=FindUselessControlFlow|true
+detectorOverridingEqualsNotSymmetrical=OverridingEqualsNotSymmetrical|true
+detectorIDivResultCastToDouble=IDivResultCastToDouble|true
+detectorReadOfInstanceFieldInMethodInvokedByConstructorInSuperclass=ReadOfInstanceFieldInMethodInvokedByConstructorInSuperclass|true
+detectorFindSelfComparison=FindSelfComparison|true
+detectorFindFloatEquality=FindFloatEquality|true
+detectorFindComparatorProblems=FindComparatorProblems|true
+detectorRepeatedConditionals=RepeatedConditionals|true
+filter_settings_neg=NOISE|
+detectorInefficientMemberAccess=InefficientMemberAccess|false
+detectorFindUncalledPrivateMethods=FindUncalledPrivateMethods|true
+detectorNumberConstructor=NumberConstructor|true
+detectorDontAssertInstanceofInTests=DontAssertInstanceofInTests|true
+detectorFindFinalizeInvocations=FindFinalizeInvocations|true
+detectorFindNullDerefsInvolvingNonShortCircuitEvaluation=FindNullDerefsInvolvingNonShortCircuitEvaluation|true
+detectorDontIgnoreResultOfPutIfAbsent=DontIgnoreResultOfPutIfAbsent|true
+detectorFindUnconditionalWait=FindUnconditionalWait|true
+detectorFindTwoLockWait=FindTwoLockWait|true
+detectorFindSleepWithLockHeld=FindSleepWithLockHeld|true
+detectorFindUnreleasedLock=FindUnreleasedLock|true
+detectorInefficientIndexOf=InefficientIndexOf|false
+detectorDoInsideDoPrivileged=DoInsideDoPrivileged|true
+detectorFindEmptySynchronizedBlock=FindEmptySynchronizedBlock|true
+detectorOverridingMethodsMustInvokeSuperDetector=OverridingMethodsMustInvokeSuperDetector|true
+detectorWaitInLoop=WaitInLoop|true
+detectorIntCast2LongAsInstant=IntCast2LongAsInstant|true
+detectorBadUseOfReturnValue=BadUseOfReturnValue|true
+detectorFindSqlInjection=FindSqlInjection|true
+detectorUnreadFields=UnreadFields|true
+detectorSynchronizingOnContentsOfFieldToProtectField=SynchronizingOnContentsOfFieldToProtectField|true
+detectorFindUselessObjects=FindUselessObjects|true
+detectorBadAppletConstructor=BadAppletConstructor|false
+detectorInheritanceUnsafeGetResource=InheritanceUnsafeGetResource|true
+detectorSerializableIdiom=SerializableIdiom|true
+detectorNaming=Naming|true
+detectorNoteUnconditionalParamDerefs=NoteUnconditionalParamDerefs|true
+detectorFormatStringChecker=FormatStringChecker|true
+detectorSuspiciousThreadInterrupted=SuspiciousThreadInterrupted|true
+detectorEmptyZipFileEntry=EmptyZipFileEntry|false
+detectorFindCircularDependencies=FindCircularDependencies|false
+detectorPreferZeroLengthArrays=PreferZeroLengthArrays|true
+detectorAtomicityProblem=AtomicityProblem|true
+detectorRuntimeExceptionCapture=RuntimeExceptionCapture|true
+detectorInitializationChain=InitializationChain|true
+detectorInitializeNonnullFieldsInConstructor=InitializeNonnullFieldsInConstructor|true
+detectorOptionalReturnNull=OptionalReturnNull|true
+detectorStartInConstructor=StartInConstructor|true
+detectorFindUnsatisfiedObligation=FindUnsatisfiedObligation|true
+detectorRedundantConditions=RedundantConditions|true
+effort=max
+detectorRedundantInterfaces=RedundantInterfaces|true
+detectorDuplicateBranches=DuplicateBranches|true
+detectorCheckTypeQualifiers=CheckTypeQualifiers|true
+detectorComparatorIdiom=ComparatorIdiom|true
+detectorFindBadCast2=FindBadCast2|true
+detectorFindMismatchedWaitOrNotify=FindMismatchedWaitOrNotify|true
+detectorBadResultSetAccess=BadResultSetAccess|true
+detectorIncompatMask=IncompatMask|true
+detectorCovariantArrayAssignment=CovariantArrayAssignment|false
+detectorDumbMethodInvocations=DumbMethodInvocations|true
+run_at_full_build=true
+detectorStaticCalendarDetector=StaticCalendarDetector|true
+detectorUncallableMethodOfAnonymousClass=UncallableMethodOfAnonymousClass|true
+detectorVarArgsProblems=VarArgsProblems|true
+detectorInefficientInitializationInsideLoop=InefficientInitializationInsideLoop|false
+detectorCloneIdiom=CloneIdiom|true
+detectorFindHEmismatch=FindHEmismatch|true
+detectorAppendingToAnObjectOutputStream=AppendingToAnObjectOutputStream|true
+detectorFindSelfComparison2=FindSelfComparison2|true
+detectorLazyInit=LazyInit|true
+detectorFindUnrelatedTypesInGenericContainer=FindUnrelatedTypesInGenericContainer|true
+detectorDontUseEnum=DontUseEnum|true
+detectorFindPuzzlers=FindPuzzlers|true
+detectorCallToUnsupportedMethod=CallToUnsupportedMethod|false
+detectorSuperfluousInstanceOf=SuperfluousInstanceOf|true
+detectorReadReturnShouldBeChecked=ReadReturnShouldBeChecked|true
+detector_threshold=3
+detectorPublicSemaphores=PublicSemaphores|false
+detectorDumbMethods=DumbMethods|true
diff --git a/tests/org.eclipse.skills.test/.project b/tests/org.eclipse.skills.test/.project
index deb4e14..2f6349a 100644
--- a/tests/org.eclipse.skills.test/.project
+++ b/tests/org.eclipse.skills.test/.project
@@ -25,10 +25,16 @@
 			<arguments>
 			</arguments>
 		</buildCommand>
+		<buildCommand>
+			<name>edu.umd.cs.findbugs.plugin.eclipse.findbugsBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
 	</buildSpec>
 	<natures>
 		<nature>org.eclipse.pde.PluginNature</nature>
 		<nature>org.eclipse.jdt.core.javanature</nature>
 		<nature>ch.acanda.eclipse.pmd.builder.PMDNature</nature>
+		<nature>edu.umd.cs.findbugs.plugin.eclipse.findbugsNature</nature>
 	</natures>
 </projectDescription>
diff --git a/tests/org.eclipse.skills.test/.settings/com.github.spotbugs.plugin.eclipse.prefs b/tests/org.eclipse.skills.test/.settings/com.github.spotbugs.plugin.eclipse.prefs
new file mode 100644
index 0000000..925c680
--- /dev/null
+++ b/tests/org.eclipse.skills.test/.settings/com.github.spotbugs.plugin.eclipse.prefs
@@ -0,0 +1,2 @@
+dontRemindAboutFullBuild=true
+eclipse.preferences.version=1
diff --git a/tests/org.eclipse.skills.test/.settings/edu.umd.cs.findbugs.core.prefs b/tests/org.eclipse.skills.test/.settings/edu.umd.cs.findbugs.core.prefs
new file mode 100644
index 0000000..af79dad
--- /dev/null
+++ b/tests/org.eclipse.skills.test/.settings/edu.umd.cs.findbugs.core.prefs
@@ -0,0 +1,144 @@
+#SpotBugs User Preferences
+#Tue Nov 24 10:38:47 CET 2020
+detectorExplicitSerialization=ExplicitSerialization|true
+detectorMultithreadedInstanceAccess=MultithreadedInstanceAccess|true
+detectorConfusionBetweenInheritedAndOuterMethod=ConfusionBetweenInheritedAndOuterMethod|true
+detectorWrongMapIterator=WrongMapIterator|true
+detectorUnnecessaryMath=UnnecessaryMath|true
+detectorUselessSubclassMethod=UselessSubclassMethod|false
+filter_settings=Low|BAD_PRACTICE,CORRECTNESS,EXPERIMENTAL,I18N,MALICIOUS_CODE,MT_CORRECTNESS,PERFORMANCE,SECURITY,STYLE|false|20
+detectorURLProblems=URLProblems|true
+detectorIteratorIdioms=IteratorIdioms|true
+detectorMutableEnum=MutableEnum|true
+detectorFindNonShortCircuit=FindNonShortCircuit|true
+detectorSynchronizeAndNullCheckField=SynchronizeAndNullCheckField|true
+detectorVolatileUsage=VolatileUsage|true
+detectorFindNakedNotify=FindNakedNotify|true
+detectorFindUninitializedGet=FindUninitializedGet|true
+detectorFindUseOfNonSerializableValue=FindUseOfNonSerializableValue|true
+detectorFindJSR166LockMonitorenter=FindJSR166LockMonitorenter|true
+detectorQuestionableBooleanAssignment=QuestionableBooleanAssignment|true
+detectorSwitchFallthrough=SwitchFallthrough|true
+detectorFindLocalSelfAssignment2=FindLocalSelfAssignment2|true
+detectorConfusedInheritance=ConfusedInheritance|true
+detectorSynchronizationOnSharedBuiltinConstant=SynchronizationOnSharedBuiltinConstant|true
+detectorMutableStaticFields=MutableStaticFields|true
+detectorInvalidJUnitTest=InvalidJUnitTest|true
+detectorInfiniteLoop=InfiniteLoop|true
+detectorFindRunInvocations=FindRunInvocations|true
+detectorBadSyntaxForRegularExpression=BadSyntaxForRegularExpression|true
+detectorXMLFactoryBypass=XMLFactoryBypass|true
+detectorFindOpenStream=FindOpenStream|true
+detectorCheckExpectedWarnings=CheckExpectedWarnings|false
+detectorHugeSharedStringConstants=HugeSharedStringConstants|true
+detectorLostLoggerDueToWeakReference=LostLoggerDueToWeakReference|true
+detectorStringConcatenation=StringConcatenation|true
+detectorLoadOfKnownNullValue=LoadOfKnownNullValue|true
+detectorFinalizerNullsFields=FinalizerNullsFields|true
+detectorFindFieldSelfAssignment=FindFieldSelfAssignment|true
+detectorInefficientToArray=InefficientToArray|false
+detectorDontCatchIllegalMonitorStateException=DontCatchIllegalMonitorStateException|true
+detectorInconsistentAnnotations=InconsistentAnnotations|true
+detectorBadlyOverriddenAdapter=BadlyOverriddenAdapter|true
+detectorInstantiateStaticClass=InstantiateStaticClass|true
+detectorCheckRelaxingNullnessAnnotation=CheckRelaxingNullnessAnnotation|true
+detectorMethodReturnCheck=MethodReturnCheck|true
+detectorEqualsOperandShouldHaveClassCompatibleWithThis=EqualsOperandShouldHaveClassCompatibleWithThis|true
+detectorFindDoubleCheck=FindDoubleCheck|true
+detectorFindBadForLoop=FindBadForLoop|true
+detectorDefaultEncodingDetector=DefaultEncodingDetector|true
+detectorFindInconsistentSync2=FindInconsistentSync2|true
+detectorFindSpinLoop=FindSpinLoop|true
+detectorFindMaskedFields=FindMaskedFields|true
+detectorBooleanReturnNull=BooleanReturnNull|true
+detectorFindUnsyncGet=FindUnsyncGet|true
+detectorCrossSiteScripting=CrossSiteScripting|true
+detectorDroppedException=DroppedException|true
+detectorFindDeadLocalStores=FindDeadLocalStores|true
+detectorCheckImmutableAnnotation=CheckImmutableAnnotation|true
+detectorInfiniteRecursiveLoop=InfiniteRecursiveLoop|true
+detectorFindRefComparison=FindRefComparison|true
+detectorFindRoughConstants=FindRoughConstants|true
+detectorMutableLock=MutableLock|true
+detectorFindNullDeref=FindNullDeref|true
+detectorFindReturnRef=FindReturnRef|true
+detectorSynchronizeOnClassLiteralNotGetClass=SynchronizeOnClassLiteralNotGetClass|true
+detectorFindUselessControlFlow=FindUselessControlFlow|true
+detectorOverridingEqualsNotSymmetrical=OverridingEqualsNotSymmetrical|true
+detectorIDivResultCastToDouble=IDivResultCastToDouble|true
+detectorReadOfInstanceFieldInMethodInvokedByConstructorInSuperclass=ReadOfInstanceFieldInMethodInvokedByConstructorInSuperclass|true
+detectorFindSelfComparison=FindSelfComparison|true
+detectorFindFloatEquality=FindFloatEquality|true
+detectorFindComparatorProblems=FindComparatorProblems|true
+detectorRepeatedConditionals=RepeatedConditionals|true
+filter_settings_neg=NOISE|
+detectorInefficientMemberAccess=InefficientMemberAccess|false
+detectorFindUncalledPrivateMethods=FindUncalledPrivateMethods|true
+detectorNumberConstructor=NumberConstructor|true
+detectorDontAssertInstanceofInTests=DontAssertInstanceofInTests|true
+detectorFindFinalizeInvocations=FindFinalizeInvocations|true
+detectorFindNullDerefsInvolvingNonShortCircuitEvaluation=FindNullDerefsInvolvingNonShortCircuitEvaluation|true
+detectorDontIgnoreResultOfPutIfAbsent=DontIgnoreResultOfPutIfAbsent|true
+detectorFindUnconditionalWait=FindUnconditionalWait|true
+detectorFindTwoLockWait=FindTwoLockWait|true
+detectorFindSleepWithLockHeld=FindSleepWithLockHeld|true
+detectorFindUnreleasedLock=FindUnreleasedLock|true
+detectorInefficientIndexOf=InefficientIndexOf|false
+detectorDoInsideDoPrivileged=DoInsideDoPrivileged|true
+detectorFindEmptySynchronizedBlock=FindEmptySynchronizedBlock|true
+detectorOverridingMethodsMustInvokeSuperDetector=OverridingMethodsMustInvokeSuperDetector|true
+detectorWaitInLoop=WaitInLoop|true
+detectorIntCast2LongAsInstant=IntCast2LongAsInstant|true
+detectorBadUseOfReturnValue=BadUseOfReturnValue|true
+detectorFindSqlInjection=FindSqlInjection|true
+detectorUnreadFields=UnreadFields|true
+detectorSynchronizingOnContentsOfFieldToProtectField=SynchronizingOnContentsOfFieldToProtectField|true
+detectorFindUselessObjects=FindUselessObjects|true
+detectorBadAppletConstructor=BadAppletConstructor|false
+detectorInheritanceUnsafeGetResource=InheritanceUnsafeGetResource|true
+detectorSerializableIdiom=SerializableIdiom|true
+detectorNaming=Naming|true
+detectorNoteUnconditionalParamDerefs=NoteUnconditionalParamDerefs|true
+detectorFormatStringChecker=FormatStringChecker|true
+detectorSuspiciousThreadInterrupted=SuspiciousThreadInterrupted|true
+detectorEmptyZipFileEntry=EmptyZipFileEntry|false
+detectorFindCircularDependencies=FindCircularDependencies|false
+detectorPreferZeroLengthArrays=PreferZeroLengthArrays|true
+detectorAtomicityProblem=AtomicityProblem|true
+detectorRuntimeExceptionCapture=RuntimeExceptionCapture|true
+detectorInitializationChain=InitializationChain|true
+detectorInitializeNonnullFieldsInConstructor=InitializeNonnullFieldsInConstructor|true
+detectorOptionalReturnNull=OptionalReturnNull|true
+detectorStartInConstructor=StartInConstructor|true
+detectorFindUnsatisfiedObligation=FindUnsatisfiedObligation|true
+detectorRedundantConditions=RedundantConditions|true
+effort=max
+detectorRedundantInterfaces=RedundantInterfaces|true
+detectorDuplicateBranches=DuplicateBranches|true
+detectorCheckTypeQualifiers=CheckTypeQualifiers|true
+detectorComparatorIdiom=ComparatorIdiom|true
+detectorFindBadCast2=FindBadCast2|true
+detectorFindMismatchedWaitOrNotify=FindMismatchedWaitOrNotify|true
+detectorBadResultSetAccess=BadResultSetAccess|true
+detectorIncompatMask=IncompatMask|true
+detectorCovariantArrayAssignment=CovariantArrayAssignment|false
+detectorDumbMethodInvocations=DumbMethodInvocations|true
+run_at_full_build=true
+detectorStaticCalendarDetector=StaticCalendarDetector|true
+detectorUncallableMethodOfAnonymousClass=UncallableMethodOfAnonymousClass|true
+detectorVarArgsProblems=VarArgsProblems|true
+detectorInefficientInitializationInsideLoop=InefficientInitializationInsideLoop|false
+detectorCloneIdiom=CloneIdiom|true
+detectorFindHEmismatch=FindHEmismatch|true
+detectorAppendingToAnObjectOutputStream=AppendingToAnObjectOutputStream|true
+detectorFindSelfComparison2=FindSelfComparison2|true
+detectorLazyInit=LazyInit|true
+detectorFindUnrelatedTypesInGenericContainer=FindUnrelatedTypesInGenericContainer|true
+detectorDontUseEnum=DontUseEnum|true
+detectorFindPuzzlers=FindPuzzlers|true
+detectorCallToUnsupportedMethod=CallToUnsupportedMethod|false
+detectorSuperfluousInstanceOf=SuperfluousInstanceOf|true
+detectorReadReturnShouldBeChecked=ReadReturnShouldBeChecked|true
+detector_threshold=3
+detectorPublicSemaphores=PublicSemaphores|false
+detectorDumbMethods=DumbMethods|true