java.lang.Throwable: Locked by:
   at org.openide.filesystems.FileLock.<init>(FileLock.java:85)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.LockForFile.<init>(LockForFile.java:91)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.LockForFile.tryLock(LockForFile.java:102)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObj.lock(FileObj.java:382)
   at org.openide.filesystems.FileObject.getOutputStream(FileObject.java:803)
   at org.nbheaven.sqe.tools.checkstyle.codedefects.core.settings.impl.GlobalCheckstyleSettings.flush(GlobalCheckstyleSettings.java:169)
   at org.nbheaven.sqe.tools.checkstyle.codedefects.core.option.CheckstylePanel.store(CheckstylePanel.java:69)
   at org.nbheaven.sqe.tools.checkstyle.codedefects.core.option.CheckstyleOptionsPanelController.applyChanges(CheckstyleOptionsPanelController.java:48)
   at org.netbeans.modules.options.TabbedController.applyChanges(TabbedController.java:133)
   at org.netbeans.modules.options.CategoryModel$Category.applyChanges(CategoryModel.java:401)
   at org.netbeans.modules.options.CategoryModel$Category.access$1100(CategoryModel.java:326)
   at org.netbeans.modules.options.CategoryModel.save(CategoryModel.java:222)
   at org.netbeans.modules.options.OptionsPanel.save(OptionsPanel.java:315)
   at org.netbeans.modules.options.OptionsDisplayerImpl$OptionsPanelListener$2.run(OptionsDisplayerImpl.java:495)
   at org.netbeans.modules.progress.ui.RunOffEDTImpl$3.run(RunOffEDTImpl.java:247)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)