update jdk version
diff --git a/pom.xml b/pom.xml
index c60234f..9e99ffb 100644
--- a/pom.xml
+++ b/pom.xml
@@ -565,8 +565,8 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <configuration>
-                    <source>1.5</source>
-                    <target>1.5</target>
+                    <source>1.6</source>
+                    <target>1.6</target>
                     <debug>true</debug>
                     <fork>true</fork>
                 </configuration>
@@ -622,7 +622,7 @@
                     the previous unless a different folder is used for the root
                     <historyDir>${basedir}/clover/history</historyDir>
                     -->
-                    <jdk>1.5</jdk>
+                    <jdk>1.6</jdk>
                     <includesTestSourceRoots>false</includesTestSourceRoots>
                     <skip>${clover.skip}</skip>
 
@@ -701,14 +701,14 @@
                                 <quiet>true</quiet>
                                 <verbose>false</verbose>
                                 <show>protected</show>
-                                <source>1.5</source>
+                                <source>1.6</source>
                                 <links>
-                                    <link>http://download.oracle.com/javase/1.5.0/docs/api/</link>
+                                    <link>http://download.oracle.com/javase/6/docs/api/</link>
                                     <link>http://static.springsource.org/spring/docs/3.0.x/javadoc-api/</link>
                                     <link>http://www2.osgi.org/javadoc/r4/</link>
                                     <link>http://asm.objectweb.org/asm223/javadoc/user</link>
                                     <link>http://cglib.sourceforge.net/apidocs</link>
-                                    <link>http://logging.apache.org/log4j/docs/api/</link>
+                                    <!--<link>http://logging.apache.org/log4j/docs/api/</link>-->
                                     <link>http://jakarta.apache.org/commons/logging/apidocs/</link>
                                     <link>http://junit.org/junit/javadoc/4.9.0/</link>
                                     <link>http://aopalliance.sourceforge.net/doc/</link>
@@ -750,7 +750,7 @@
                             <groupId>org.apache.maven.plugins</groupId>
                             <artifactId>maven-pmd-plugin</artifactId>
                             <configuration>
-                                <targetJdk>1.5</targetJdk>
+                                <targetJdk>1.6</targetJdk>
                             </configuration>
                         </plugin>