java.lang.IllegalArgumentException: Argument cannot be null
	at org.eclipse.swt.SWT.error(SWT.java:4342)
	at org.eclipse.swt.SWT.error(SWT.java:4276)
	at org.eclipse.swt.SWT.error(SWT.java:4247)
	at org.eclipse.swt.graphics.GC.<init>(GC.java:156)
	at org.eclipse.swt.graphics.GC.<init>(GC.java:125)
	at org.jboss.tools.common.model.ui.forms.DefaultFormPage.getFontHeight(DefaultFormPage.java:147)
	at org.jboss.tools.common.model.ui.forms.DefaultFormPage.getTitleHeight(DefaultFormPage.java:142)
	at org.jboss.tools.common.model.ui.forms.DefaultFormPage.access$2(DefaultFormPage.java:136)
	at org.jboss.tools.common.model.ui.forms.DefaultFormPage$FormLayout.layout(DefaultFormPage.java:201)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1567)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1573)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1573)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1573)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1573)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1573)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1573)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1573)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1573)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1573)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1573)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1573)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1573)
	at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1573)
	at org.eclipse.swt.widgets.Composite.setLayoutDeferred(Composite.java:1423)
	at org.eclipse.swt.widgets.Display.runDeferredLayouts(Display.java:3578)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3166)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1022)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:916)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86)
	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:585)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:540)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:353)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1414)

java.lang.NullPointerException
	at org.jboss.tools.common.model.ui.action.ModelContributionManager.getSelectedModelObjects(ModelContributionManager.java:68)
	at org.jboss.tools.common.model.ui.action.ModelContributionManager.update(ModelContributionManager.java:49)
	at org.eclipse.jface.action.MenuManager.update(MenuManager.java:682)
	at org.eclipse.e4.ui.workbench.renderers.swt.MenuManagerRenderer.processContents(MenuManagerRenderer.java:508)
	at org.eclipse.e4.ui.workbench.swt.modeling.MenuService.registerMenu(MenuService.java:83)
	at org.eclipse.ui.internal.PopupMenuExtender.registerE4Support(PopupMenuExtender.java:182)
	at org.eclipse.ui.internal.PopupMenuExtender.createModelFor(PopupMenuExtender.java:176)
	at org.eclipse.ui.internal.PopupMenuExtender.<init>(PopupMenuExtender.java:147)
	at org.eclipse.ui.internal.PartSite.registerContextMenu(PartSite.java:130)
	at org.eclipse.ui.internal.PartSite.registerContextMenu(PartSite.java:495)
	at org.eclipse.ui.internal.PartSite.registerContextMenu(PartSite.java:504)
	at org.eclipse.ui.part.MultiPageEditorSite.registerContextMenu(MultiPageEditorSite.java:523)
	at org.jboss.tools.common.editor.XModelObjectTreeViewComponent.initContextMenu(XModelObjectTreeViewComponent.java:134)
	at org.jboss.tools.common.editor.XModelObjectTreeViewComponent.createControl(XModelObjectTreeViewComponent.java:92)
	at org.jboss.tools.common.editor.form.SampleTreeForm.createClientArea(SampleTreeForm.java:82)
	at org.jboss.tools.common.model.ui.forms.ExpandableForm.createControl(ExpandableForm.java:103)
	at org.jboss.tools.common.model.ui.forms.SplitFormContainer.createFirstForm(SplitFormContainer.java:79)
	at org.jboss.tools.common.model.ui.forms.SplitFormContainer.createControl(SplitFormContainer.java:103)
	at org.jboss.tools.common.model.ui.forms.DefaultFormContainer.createControl(DefaultFormContainer.java:46)
	at org.jboss.tools.common.model.ui.forms.DefaultFormPage.createFormControl(DefaultFormPage.java:94)
	at org.jboss.tools.common.editor.TreeFormPage.createFormControl(TreeFormPage.java:153)
	at org.jboss.tools.common.model.ui.forms.DefaultFormPage.createControl(DefaultFormPage.java:108)
	at org.jboss.tools.common.editor.TreeFormPage.createPartControl(TreeFormPage.java:403)
	at org.eclipse.ui.part.MultiPageEditorPart.addPage(MultiPageEditorPart.java:243)
	at org.eclipse.ui.part.MultiPageEditorPart.addPage(MultiPageEditorPart.java:213)
	at org.jboss.tools.common.editor.ObjectMultiPageEditor.addFormPage(ObjectMultiPageEditor.java:964)
	at org.jboss.tools.jst.web.ui.editors.WebCompoundEditor.doCreatePages(WebCompoundEditor.java:37)
	at org.jboss.tools.common.editor.ObjectMultiPageEditor.createPages(ObjectMultiPageEditor.java:250)
	at org.eclipse.ui.part.MultiPageEditorPart.createPartControl(MultiPageEditorPart.java:358)
	at org.jboss.tools.common.model.ui.editor.EditorPartWrapper.createPartControl(EditorPartWrapper.java:176)
	at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.createPartControl(CompatibilityPart.java:129)
	at org.eclipse.ui.internal.e4.compatibility.CompatibilityEditor.createPartControl(CompatibilityEditor.java:95)
	at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.create(CompatibilityPart.java:300)
	at sun.reflect.GeneratedMethodAccessor121.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56)
	at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:857)
	at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:837)
	at org.eclipse.e4.core.internal.di.InjectorImpl.inject(InjectorImpl.java:111)
	at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:318)
	at org.eclipse.e4.core.internal.di.InjectorImpl.make(InjectorImpl.java:240)
	at org.eclipse.e4.core.contexts.ContextInjectionFactory.make(ContextInjectionFactory.java:161)
	at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.createFromBundle(ReflectionContributionFactory.java:102)
	at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.doCreate(ReflectionContributionFactory.java:71)
	at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.create(ReflectionContributionFactory.java:53)
	at org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer.createWidget(ContributedPartRenderer.java:141)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createWidget(PartRenderingEngine.java:889)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:623)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:725)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:696)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:690)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:675)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$1.handleEvent(PartServiceImpl.java:90)
	at org.eclipse.e4.ui.services.internal.events.UIEventHandler$1.run(UIEventHandler.java:41)
	at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:180)
	at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:150)
	at org.eclipse.swt.widgets.Display.syncExec(Display.java:4291)
	at org.eclipse.e4.ui.internal.workbench.swt.E4Application$1.syncExec(E4Application.java:187)
	at org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(UIEventHandler.java:38)
	at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:197)
	at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:197)
	at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1)
	at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
	at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)
	at org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:135)
	at org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:78)
	at org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:39)
	at org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:81)
	at org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:57)
	at org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:374)
	at org.eclipse.e4.ui.model.application.ui.impl.ElementContainerImpl.setSelectedElement(ElementContainerImpl.java:171)
	at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.showElementInWindow(ModelServiceImpl.java:418)
	at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.bringToTop(ModelServiceImpl.java:385)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.delegateBringToTop(PartServiceImpl.java:578)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.bringToTop(PartServiceImpl.java:314)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.showPart(PartServiceImpl.java:962)
	at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:3071)
	at org.eclipse.ui.internal.WorkbenchPage.access$21(WorkbenchPage.java:2996)
	at org.eclipse.ui.internal.WorkbenchPage$8.run(WorkbenchPage.java:2978)
	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2974)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2933)
	at org.eclipse.ui.actions.OpenWithMenu.openEditor(OpenWithMenu.java:338)
	at org.eclipse.ui.actions.OpenWithMenu$2.handleEvent(OpenWithMenu.java:180)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1276)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3554)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3179)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1022)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:916)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86)
	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:585)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:540)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:353)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1414)