java.lang.NullPointerException
        at com.sun.tools.javadoc.JavadocEnter.visitClassDef(JavadocEnter.java:88)
        at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:587)
        at com.sun.tools.javac.comp.Enter.classEnter(Enter.java:283)
        at com.sun.tools.javac.comp.Enter.classEnter(Enter.java:297)
        at com.sun.tools.javac.comp.Enter.visitTopLevel(Enter.java:348)
        at com.sun.tools.javadoc.JavadocEnter.visitTopLevel(JavadocEnter.java:77)
        at com.sun.tools.javac.tree.JCTree$JCCompilationUnit.accept(JCTree.java:450)
        at com.sun.tools.javac.comp.Enter.classEnter(Enter.java:283)
        at com.sun.tools.javac.comp.Enter.classEnter(Enter.java:297)
        at com.sun.tools.javac.comp.Enter.complete(Enter.java:639)
        at com.sun.tools.javac.main.JavaCompiler.complete(JavaCompiler.java:732)
        at com.sun.tools.javac.jvm.ClassReader.fillIn(ClassReader.java:1936)
        at com.sun.tools.javac.jvm.ClassReader.complete(ClassReader.java:1836)
        at com.sun.tools.javac.code.Symbol.complete(Symbol.java:405)
        at com.sun.tools.javac.code.Symbol$ClassSymbol.complete(Symbol.java:800)
        at com.sun.tools.javac.jvm.ClassReader.loadClass(ClassReader.java:2018)
        at com.sun.tools.javac.comp.Resolve.loadClass(Resolve.java:870)
        at com.sun.tools.javac.comp.Resolve.findGlobalType(Resolve.java:934)
        at com.sun.tools.javac.comp.Resolve.findType(Resolve.java:986)
        at com.sun.tools.javac.comp.Resolve.findIdent(Resolve.java:1015)
        at com.sun.tools.javac.comp.Attr$IdentAttributer.visitIdentifier(Attr.java:301)
        at com.sun.tools.javac.comp.Attr$IdentAttributer.visitIdentifier(Attr.java:281)
        at com.sun.tools.javac.tree.JCTree$JCIdent.accept(JCTree.java:1689)
        at com.sun.tools.javac.comp.Attr.attribIdent(Attr.java:277)
        at com.sun.tools.javac.main.JavaCompiler.resolveIdent(JavaCompiler.java:646)
        at com.sun.tools.javac.model.JavacElements.binaryNameToClassSymbol(JavacElements.java:172)
        at com.sun.tools.javac.model.JavacElements.getTypeElementByBinaryName(JavacElements.java:162)
        at org.netbeans.api.java.source.ElementHandle.getTypeElementByBinaryName(ElementHandle.java:536)
        at org.netbeans.api.java.source.ElementHandle.resolveImpl(ElementHandle.java:151)
        at org.netbeans.api.java.source.ElementHandle.resolve(ElementHandle.java:131)
        at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.PersistentObjectManager.typesChanged(PersistentObjectManager.java:204)
        at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper$ClassIndexListenerImpl$3.call(AnnotationModelHelper.java:449)
        at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper$ClassIndexListenerImpl$3.call(AnnotationModelHelper.java:446)
        at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper.runCallable(AnnotationModelHelper.java:247)
        at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper.access$100(AnnotationModelHelper.java:82)
        at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper$2.run(AnnotationModelHelper.java:183)
        at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper$2.run(AnnotationModelHelper.java:181)
        at org.netbeans.api.java.source.JavaSource$MimeTask.run(JavaSource.java:517)
        at org.netbeans.modules.parsing.api.ParserManager$MimeTaskAction.run(ParserManager.java:172)
        at org.netbeans.modules.parsing.api.ParserManager$MimeTaskAction.run(ParserManager.java:156)
        at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:191)
        at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:144)
        at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:384)
        at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:376)
        at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper.runJavaSourceTask(AnnotationModelHelper.java:181)
        at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper$ClassIndexListenerImpl.runInJavacContext(AnnotationModelHelper.java:488)
        at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper$ClassIndexListenerImpl.typesChanged(AnnotationModelHelper.java:446)
        at org.netbeans.api.java.source.ClassIndex$SPIListener.typesChanged(ClassIndex.java:553)
        at org.netbeans.modules.java.source.usages.ClassIndexImpl.typesEvent(ClassIndexImpl.java:143)
        at org.netbeans.modules.java.source.usages.RepositoryUpdater$CompileWorker.updateFile(RepositoryUpdater.java:2518)
        at org.netbeans.modules.java.source.usages.RepositoryUpdater$CompileWorker.access$3200(RepositoryUpdater.java:1297)
        at org.netbeans.modules.java.source.usages.RepositoryUpdater$CompileWorker$1.run(RepositoryUpdater.java:1569)
        at org.netbeans.modules.java.source.usages.RepositoryUpdater$CompileWorker$1.run(RepositoryUpdater.java:1339)
        at org.netbeans.modules.java.source.usages.ClassIndexManager.writeLock(ClassIndexManager.java:99)
        at org.netbeans.modules.java.source.usages.RepositoryUpdater$CompileWorker.run(RepositoryUpdater.java:1339)
        at org.netbeans.modules.java.source.usages.RepositoryUpdater$CompileWorker.run(RepositoryUpdater.java:1297)
        at org.netbeans.modules.java.source.JavaSourceAccessor$1.run(JavaSourceAccessor.java:119)
        at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:610)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:619)