java.lang.NullPointerException
   at org.netbeans.modules.j2ee.persistence.wizard.jpacontroller.JpaControllerGenerator.addImplementsClause(JpaControllerGenerator.java:219)
   at org.netbeans.modules.j2ee.persistence.wizard.jpacontroller.JpaControllerGenerator.generateJpaController(JpaControllerGenerator.java:167)
   at org.netbeans.modules.j2ee.persistence.wizard.jpacontroller.JpaControllerIterator.generateJpaControllers(JpaControllerIterator.java:255)
   at org.netbeans.modules.web.jsf.wizards.PersistenceClientIterator$1$1.run(PersistenceClientIterator.java:215)
   at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:125)
   at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:566)
   at org.netbeans.modules.web.jsf.wizards.PersistenceClientIterator$1.run(PersistenceClientIterator.java:200)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1424)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1968)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.NullPointerException
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:425)
   at org.netbeans.modules.web.jsf.wizards.PersistenceClientIterator$2.run(PersistenceClientIterator.java:264)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:148)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)