Original submitter: lvv

Description:
Build Coke Linux & Windows XP.

To reproduce:

- using Property Editor add tagged value with empty alias to some symbol, class
for example.
BUG: the exception will be thrown in output (see "Caused by" at the bottom of
the trace):


java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:585)
	at
com.embarcadero.uml.core.support.umlutils.PropertyElementManager.setData(PropertyElementManager.java:276)
	at
com.embarcadero.uml.core.support.umlutils.PropertyElement.save(PropertyElement.java:229)
	at
com.sun.tools.ide.uml.propertysupport.customizers.PropertyElementCustomizer$PropertyElementTabelModel$PropertyData.save(PropertyElementCustomizer.java:659)
	at
com.sun.tools.ide.uml.propertysupport.customizers.PropertyElementCustomizer$PropertyElementTabelModel$PropertyData.save(PropertyElementCustomizer.java:663)
	at
com.sun.tools.ide.uml.propertysupport.customizers.PropertyElementCustomizer$PropertyElementTabelModel$PropertyData.save(PropertyElementCustomizer.java:651)
	at
com.sun.tools.ide.uml.propertysupport.customizers.PropertyElementCustomizer$PropertyElementTabelModel.saveModel(PropertyElementCustomizer.java:395)
	at
com.sun.tools.ide.uml.propertysupport.customizers.PropertyElementCustomizer.getPropertyValue(PropertyElementCustomizer.java:312)
	at
org.openide.explorer.propertysheet.PropertyDialogManager.doButtonPressed(PropertyDialogManager.java:491)
	at
org.openide.explorer.propertysheet.PropertyDialogManager.access$000(PropertyDialogManager.java:40)
	at
org.openide.explorer.propertysheet.PropertyDialogManager$1.actionPerformed(PropertyDialogManager.java:121)
	at
org.netbeans.core.windows.services.NbPresenter$ButtonListener.actionPerformed(NbPresenter.java:1074)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)
	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2169)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
	at
javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:234)
	at java.awt.Component.processMouseEvent(Component.java:5488)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3126)
	at java.awt.Component.processEvent(Component.java:5253)
	at java.awt.Container.processEvent(Container.java:1966)
	at java.awt.Component.dispatchEventImpl(Component.java:3955)
	at java.awt.Container.dispatchEventImpl(Container.java:2024)
	at java.awt.Component.dispatchEvent(Component.java:3803)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3892)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)
	at java.awt.Container.dispatchEventImpl(Container.java:2010)
	at java.awt.Window.dispatchEventImpl(Window.java:1774)
	at java.awt.Component.dispatchEvent(Component.java:3803)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
	at
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
	at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
	at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:153)
	at java.awt.Dialog$1.run(Dialog.java:515)
	at java.awt.Dialog.show(Dialog.java:536)
	at org.netbeans.core.windows.services.NbPresenter.superShow(NbPresenter.java:810)
	at org.netbeans.core.windows.services.NbPresenter.doShow(NbPresenter.java:853)
	at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:841)
	at org.openide.util.Mutex.doEventAccess(Mutex.java:1172)
	at org.openide.util.Mutex.readAccess(Mutex.java:209)
	at org.netbeans.core.windows.services.NbPresenter.show(NbPresenter.java:826)
	at
org.openide.explorer.propertysheet.CustomEditorAction.actionPerformed(CustomEditorAction.java:301)
	at
org.openide.explorer.propertysheet.SheetTable.processMouseEvent(SheetTable.java:679)
	at java.awt.Component.processEvent(Component.java:5253)
	at java.awt.Container.processEvent(Container.java:1966)
	at java.awt.Component.dispatchEventImpl(Component.java:3955)
	at java.awt.Container.dispatchEventImpl(Container.java:2024)
	at java.awt.Component.dispatchEvent(Component.java:3803)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3889)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)
	at java.awt.Container.dispatchEventImpl(Container.java:2010)
	at java.awt.Window.dispatchEventImpl(Window.java:1774)
	at java.awt.Component.dispatchEvent(Component.java:3803)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
	at
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
	at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
Caused by: java.lang.NullPointerException
	at
com.embarcadero.uml.core.metamodel.core.foundation.NamedElement.setAlias(NamedElement.java:864)
	... 64 more