java.lang.NullPointerException: Passed null to FileOwnerQuery.getOwner(FileObject)
   at org.netbeans.api.project.FileOwnerQuery.getOwner(FileOwnerQuery.java:109)
   at net.rwx.netbeans.netesta.files.CompiledFileObserver.<init>(CompiledFileObserver.java:58)
   at net.rwx.netbeans.netesta.NetestaHandler.<init>(NetestaHandler.java:41)
   at net.rwx.netbeans.netesta.DataObjectOpenAndCloseListener.addChangeListenerIfTestableSourceCode(DataObjectOpenAndCloseListener.java:75)
   at net.rwx.netbeans.netesta.DataObjectOpenAndCloseListener.addChangeListenerIfTestableSourceCode(DataObjectOpenAndCloseListener.java:69)
   at net.rwx.netbeans.netesta.DataObjectOpenAndCloseListener.propertyChange(DataObjectOpenAndCloseListener.java:52)
   at java.beans.PropertyChangeSupport.fire(PropertyChangeSupport.java:335)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:327)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:263)
   at org.netbeans.core.windows.RegistryImpl.doFirePropertyChange(RegistryImpl.java:329)
   at org.netbeans.core.windows.RegistryImpl.topComponentOpened(RegistryImpl.java:188)
   at org.netbeans.core.windows.WindowManagerImpl.notifyRegistryTopComponentOpened(WindowManagerImpl.java:1183)
   at org.netbeans.core.windows.WindowManagerImpl.notifyTopComponentOpened(WindowManagerImpl.java:1151)
   at org.netbeans.core.windows.Central.addModeOpenedTopComponent(Central.java:798)
   at org.netbeans.core.windows.ModeImpl.addOpenedTopComponent(ModeImpl.java:354)
   at org.netbeans.core.windows.WindowManagerImpl.topComponentOpenAtTabPosition(WindowManagerImpl.java:1261)
   at org.netbeans.core.windows.WindowManagerImpl.topComponentOpen(WindowManagerImpl.java:1226)
   at org.openide.windows.TopComponent.open(TopComponent.java:497)
   at org.openide.windows.TopComponent.open(TopComponent.java:477)
   at org.openide.windows.CloneableOpenSupport.openCloneableTopComponent(CloneableOpenSupport.java:208)
   at org.openide.windows.CloneableOpenSupport$1.run(CloneableOpenSupport.java:107)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
   at java.awt.EventQueue.access$500(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:709)
   at java.awt.EventQueue$3.run(EventQueue.java:703)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)