java.lang.NullPointerException
	at org.netbeans.modules.javacore.jmiimpl.javamodel.JavaClassImpl.matchPersistent(JavaClassImpl.java:316)
	at org.netbeans.modules.javacore.jmiimpl.javamodel.SemiPersistentElement.setElementInfo(SemiPersistentElement.java:82)
	at org.netbeans.modules.javacore.jmiimpl.javamodel.ResourceImpl.matchElementInfo(ResourceImpl.java:160)
	at org.netbeans.modules.javacore.jmiimpl.javamodel.SemiPersistentElement.setElementInfo(SemiPersistentElement.java:85)
	at org.netbeans.modules.javacore.jmiimpl.javamodel.ResourceImpl.directUpdate(ResourceImpl.java:394)
	at org.netbeans.modules.javacore.jmiimpl.javamodel.ResourceImpl.updateFromDataObject(ResourceImpl.java:314)
	at org.netbeans.modules.javacore.ExclusiveMutex.parseIfNeeded(ExclusiveMutex.java:104)
	at org.netbeans.modules.javacore.ExclusiveMutex.enter(ExclusiveMutex.java:73)
	at org.netbeans.mdr.NBMDRepositoryImpl.beginTrans(NBMDRepositoryImpl.java:218)
	at org.netbeans.modules.java.JavaEditor.parseSource(JavaEditor.java:229)
	at org.netbeans.modules.java.JavaEditor.changeTimeoutElapsed(JavaEditor.java:222)
	at org.netbeans.modules.java.JavaEditor.access$400(JavaEditor.java:65)
	at org.netbeans.modules.java.JavaEditor$2.actionPerformed(JavaEditor.java:300)
	at javax.swing.Timer.fireActionPerformed(Timer.java:271)
[catch] at javax.swing.Timer$DoPostEvent.run(Timer.java:201)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:454)
	at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)