org.openide.filesystems.FileAlreadyLockedException: Editors/AnnotationTypes/mixed_BP.xml
   at org.openide.filesystems.StreamPool$1.read(StreamPool.java:104)
   at com.sun.org.apache.xerces.internal.impl.XMLEntityManager$RewindableInputStream.read(XMLEntityManager.java:2892)
   at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(XMLEntityManager.java:673)
   at com.sun.org.apache.xerces.internal.impl.XMLVersionDetector.determineDocVersion(XMLVersionDetector.java:189)
   at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:812)
   at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777)
   at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
   at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1213)
   at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:649)
   at org.netbeans.modules.editor.options.AnnotationTypeProcessor.parse(AnnotationTypeProcessor.java:178)
   at org.netbeans.modules.editor.options.AnnotationTypeProcessor.instanceCreate(AnnotationTypeProcessor.java:139)
   at org.openide.loaders.XMLDataObject$ICDel.instanceCreate(XMLDataObject.java:1396)
   at org.openide.loaders.FolderInstance.instanceForCookie(FolderInstance.java:580)
   at org.openide.loaders.FolderInstance$HoldInstance.instanceCreate(FolderInstance.java:1153)
   at org.netbeans.modules.editor.options.AnnotationTypesFolder.createInstance(AnnotationTypesFolder.java:141)
   at org.openide.loaders.FolderInstance.defaultProcessObjectsFinal(FolderInstance.java:888)
   at org.openide.loaders.FolderInstance$1R.run(FolderInstance.java:730)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)