Happy checkstyle

Added missing javadoc.

Change-Id: I39ff73f5e876b43a9cc07c7298d21f141436b346
Signed-off-by: Philip Langer <planger@eclipsesource.com>
diff --git a/plugins/org.eclipse.emf.compare.diagram.ide.ui.papyrus/src/org/eclipse/emf/compare/diagram/ide/ui/papyrus/internal/AbstractPapyrusResourceSetHook.java b/plugins/org.eclipse.emf.compare.diagram.ide.ui.papyrus/src/org/eclipse/emf/compare/diagram/ide/ui/papyrus/internal/AbstractPapyrusResourceSetHook.java
index c99ef60..8fe2b18 100644
--- a/plugins/org.eclipse.emf.compare.diagram.ide.ui.papyrus/src/org/eclipse/emf/compare/diagram/ide/ui/papyrus/internal/AbstractPapyrusResourceSetHook.java
+++ b/plugins/org.eclipse.emf.compare.diagram.ide.ui.papyrus/src/org/eclipse/emf/compare/diagram/ide/ui/papyrus/internal/AbstractPapyrusResourceSetHook.java
@@ -30,12 +30,8 @@
 	/**
 	 * File extensions registered in Papyrus.
 	 */
-	protected final Set<String> fileExtensions;
-
-	public AbstractPapyrusResourceSetHook() {
-		super();
-		fileExtensions = ImmutableSet.copyOf(ModelExtensionUtil.getRegisteredFileExtensions());
-	}
+	protected final Set<String> fileExtensions = ImmutableSet.copyOf(ModelExtensionUtil
+			.getRegisteredFileExtensions());
 
 	/**
 	 * Hooks in when any of the file extensions registered in Papyrus are loaded. {@inheritDoc}
diff --git a/plugins/org.eclipse.emf.compare.diagram.ide.ui.papyrus/src/org/eclipse/emf/compare/diagram/ide/ui/papyrus/internal/ElementTypeSetConfigurationRegistryInitializingHook.java b/plugins/org.eclipse.emf.compare.diagram.ide.ui.papyrus/src/org/eclipse/emf/compare/diagram/ide/ui/papyrus/internal/ElementTypeSetConfigurationRegistryInitializingHook.java
index 324053e..6470cf0 100644
--- a/plugins/org.eclipse.emf.compare.diagram.ide.ui.papyrus/src/org/eclipse/emf/compare/diagram/ide/ui/papyrus/internal/ElementTypeSetConfigurationRegistryInitializingHook.java
+++ b/plugins/org.eclipse.emf.compare.diagram.ide.ui.papyrus/src/org/eclipse/emf/compare/diagram/ide/ui/papyrus/internal/ElementTypeSetConfigurationRegistryInitializingHook.java
@@ -36,10 +36,13 @@
  */
 public class ElementTypeSetConfigurationRegistryInitializingHook extends AbstractPapyrusResourceSetHook {
 
+	/** The id of the bundle containing the class ElementTypeSetConfigurationRegistry. */
 	private static final String BUNDLE_ID = "org.eclipse.papyrus.infra.elementtypesconfigurations"; //$NON-NLS-1$
 
+	/** The method to be invoked in ElementTypeSetConfigurationRegistry. */
 	private static final String GET_INSTANCE = "getInstance"; //$NON-NLS-1$
 
+	/** The qualified class name of ElementTypeSetConfigurationRegistry. */
 	private static final String ELEMENTTYPESETCONFIGREG_CLASS_NAME = "org.eclipse.papyrus.infra.elementtypesconfigurations.registries.ElementTypeSetConfigurationRegistry"; //$NON-NLS-1$
 
 	@Override
@@ -75,6 +78,12 @@
 		});
 	}
 
+	/**
+	 * Logs the specified exception <code>e</code>.
+	 * 
+	 * @param e
+	 *            The exception to be logged.
+	 */
 	private void logException(Exception e) {
 		CompareDiagramIDEUIPapyrusPlugin.getDefault().getLog().log(
 				new Status(IStatus.WARNING, CompareDiagramIDEUIPapyrusPlugin.PLUGIN_ID,
diff --git a/plugins/org.eclipse.emf.compare.diagram.ide.ui.papyrus/src/org/eclipse/emf/compare/diagram/ide/ui/papyrus/util/ModelExtensionUtil.java b/plugins/org.eclipse.emf.compare.diagram.ide.ui.papyrus/src/org/eclipse/emf/compare/diagram/ide/ui/papyrus/util/ModelExtensionUtil.java
index 617a8b5..1457f63 100644
--- a/plugins/org.eclipse.emf.compare.diagram.ide.ui.papyrus/src/org/eclipse/emf/compare/diagram/ide/ui/papyrus/util/ModelExtensionUtil.java
+++ b/plugins/org.eclipse.emf.compare.diagram.ide.ui.papyrus/src/org/eclipse/emf/compare/diagram/ide/ui/papyrus/util/ModelExtensionUtil.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015 EclipseSource Muenchen GmbH and others.
+ * Copyright (c) 2015, 2016 EclipseSource Muenchen GmbH and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -8,6 +8,7 @@
  * Contributors:
  *     Stefan Dirix - initial API and implementation
  *     Laurent Delaigue - Log invalid configuration
+ *     Philip Langer - javadoc
  *******************************************************************************/
 package org.eclipse.emf.compare.diagram.ide.ui.papyrus.util;
 
@@ -191,17 +192,36 @@
 			return null;
 		}
 
-		// since Papyrus 2.0 we have to implement canPersist
-		// we omit @Override on purpose to be backward compatible
+		/**
+		 * Stub implementation, which always returns <code>false</code>.
+		 * <p>
+		 * Since Papyrus 2.0, {@link AbstractBaseModel} forces us to implement
+		 * {@link AbstractBaseModel#canPersist(EObject)}. We omit <code>@Override</code> on purpose to be
+		 * backward compatible.
+		 * </p>
+		 * 
+		 * @param eObject
+		 *            This parameter will be ignored.
+		 * @return <code>false</code>.
+		 */
 		@SuppressWarnings("all")
 		public boolean canPersist(EObject eObject) {
 			return false;
 		}
 
-		// since Papyrus 2.0 we have to implement persist
-		// we omit @Override on purpose to be backward compatible
+		/**
+		 * Stub implementation, which does nothing.
+		 * <p>
+		 * Since Papyrus 2.0, {@link AbstractBaseModel} forces us to implement
+		 * {@link AbstractBaseModel#persist(EObject)}. We omit <code>@Override</code> on purpose to be
+		 * backward compatible.
+		 * </p>
+		 * 
+		 * @param eObject
+		 *            This parameter will be ignored.
+		 */
 		@SuppressWarnings("all")
-		public void persist(EObject object) {
+		public void persist(EObject eObject) {
 			// no implementation
 		}
 	}