java.lang.NullPointerException
   at org.netbeans.modules.web.refactoring.RefactoringUtil.getPackageName(RefactoringUtil.java:213)
   at org.netbeans.modules.web.refactoring.rename.WebXmlMove.getRenameItems(WebXmlMove.java:63)
   at org.netbeans.modules.web.refactoring.rename.BaseWebXmlRename.prepare(BaseWebXmlRename.java:73)
   at org.netbeans.modules.web.refactoring.WebRefactoringPlugin.prepare(WebRefactoringPlugin.java:74)
   at org.netbeans.modules.refactoring.api.AbstractRefactoring.pluginsPrepare2(AbstractRefactoring.java:442)
   at org.netbeans.modules.refactoring.api.AbstractRefactoring.pluginsPrepare(AbstractRefactoring.java:426)
   at org.netbeans.modules.refactoring.api.AbstractRefactoring.prepare(AbstractRefactoring.java:237)
   at org.netbeans.modules.refactoring.spi.impl.ParametersPanel$Prepare.run(ParametersPanel.java:1090)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)