java.lang.NullPointerException
   at org.netbeans.jpa.modeler.spec.Embeddable.load(Embeddable.java:77)
   at org.netbeans.jpa.modeler.spec.ElementCollection.load(ElementCollection.java:191)
   at org.netbeans.jpa.modeler.spec.Attributes.load(Attributes.java:148)
   at org.netbeans.jpa.modeler.spec.Entity.load(Entity.java:266)
   at org.netbeans.jpa.modeler.jcre.wizard.JPAModelGenerator$1.run(JPAModelGenerator.java:49)
   at org.netbeans.jpa.modeler.jcre.wizard.JPAModelGenerator$1.run(JPAModelGenerator.java:39)
   at org.netbeans.modules.java.source.parsing.MimeTask.run(MimeTask.java:83)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:598)
   at org.netbeans.modules.parsing.api.ParserManager$MimeTaskAction.run(ParserManager.java:382)
   at org.netbeans.modules.parsing.api.ParserManager$MimeTaskAction.run(ParserManager.java:365)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:206)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:203)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:74)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:203)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:336)
   at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:422)
   at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:414)
   at org.netbeans.jpa.modeler.jcre.wizard.JPAModelGenerator.generateJPAModel(JPAModelGenerator.java:39)
   at org.netbeans.jpa.modeler.jcre.wizard.RevEngWizardDescriptor.generateJPAModel(RevEngWizardDescriptor.java:184)
   at org.netbeans.jpa.modeler.jcre.wizard.RevEngWizardDescriptor$1.run(RevEngWizardDescriptor.java:110)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)