java.lang.reflect.InvocationTargetException
	at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:477)
	at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:372)
	at org.eclipse.jface.wizard.WizardDialog.run(WizardDialog.java:1028)
	at org.jboss.tools.maven.project.examples.wizard.ArchetypeExamplesWizardPage.getRequiredProperties(ArchetypeExamplesWizardPage.java:184)
	at org.jboss.tools.maven.project.examples.wizard.ArchetypeExamplesWizardPage.initializeArchetype(ArchetypeExamplesWizardPage.java:135)
	at org.jboss.tools.maven.project.examples.wizard.ArchetypeExamplesWizardPage.setProjectExample(ArchetypeExamplesWizardPage.java:472)
	at org.jboss.tools.project.examples.wizard.NewProjectExamplesMainPage$1.selectionChanged(NewProjectExamplesMainPage.java:216)
	at org.eclipse.jface.viewers.Viewer$2.run(Viewer.java:164)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)
	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)
	at org.eclipse.jface.viewers.Viewer.fireSelectionChanged(Viewer.java:162)
	at org.eclipse.jface.viewers.StructuredViewer.updateSelection(StructuredViewer.java:2188)
	at org.eclipse.jface.viewers.StructuredViewer.handleSelect(StructuredViewer.java:1211)
	at org.eclipse.jface.viewers.StructuredViewer$4.widgetSelected(StructuredViewer.java:1241)
	at org.eclipse.jface.util.OpenStrategy.fireSelectionEvent(OpenStrategy.java:239)
	at org.eclipse.jface.util.OpenStrategy.access$4(OpenStrategy.java:233)
	at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:403)
	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.jface.window.Window.runEventLoop(Window.java:825)
	at org.eclipse.jface.window.Window.open(Window.java:801)
	at org.jboss.tools.central.actions.NewProjectExamplesWizardHandler.execute(NewProjectExamplesWizardHandler.java:62)
	at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:290)
	at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:76)
	at sun.reflect.GeneratedMethodAccessor242.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.invokeUsingClass(InjectorImpl.java:229)
	at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:210)
	at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:131)
	at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:171)
	at org.eclipse.ui.internal.handlers.LegacyHandlerService.executeCommand(LegacyHandlerService.java:500)
	at org.eclipse.ui.menus.CommandContributionItem.handleWidgetSelection(CommandContributionItem.java:824)
	at org.eclipse.ui.menus.CommandContributionItem.access$19(CommandContributionItem.java:810)
	at org.eclipse.ui.menus.CommandContributionItem$5.handleEvent(CommandContributionItem.java:800)
	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:1029)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:923)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86)
	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:588)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543)
	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)
Caused by: org.apache.maven.artifact.InvalidArtifactRTException: For artifact {null:null:null:pom}: The groupId cannot be empty.
	at org.apache.maven.artifact.DefaultArtifact.validateIdentity(DefaultArtifact.java:130)
	at org.apache.maven.artifact.DefaultArtifact.<init>(DefaultArtifact.java:123)
	at org.apache.maven.artifact.factory.DefaultArtifactFactory.createArtifact(DefaultArtifactFactory.java:157)
	at org.apache.maven.artifact.factory.DefaultArtifactFactory.createArtifact(DefaultArtifactFactory.java:117)
	at org.apache.maven.artifact.factory.DefaultArtifactFactory.createArtifact(DefaultArtifactFactory.java:111)
	at org.apache.maven.artifact.factory.DefaultArtifactFactory.createArtifactWithClassifier(DefaultArtifactFactory.java:45)
	at org.apache.maven.repository.legacy.LegacyRepositorySystem.createArtifactWithClassifier(LegacyRepositorySystem.java:129)
	at org.eclipse.m2e.core.internal.embedder.MavenImpl.resolve(MavenImpl.java:639)
	at org.jboss.tools.maven.project.examples.wizard.ArchetypeExamplesWizardPage.downloadArchetype(ArchetypeExamplesWizardPage.java:255)
	at org.jboss.tools.maven.project.examples.wizard.ArchetypeExamplesWizardPage.access$4(ArchetypeExamplesWizardPage.java:245)
	at org.jboss.tools.maven.project.examples.wizard.ArchetypeExamplesWizardPage$3.run(ArchetypeExamplesWizardPage.java:199)
	at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:464)
	... 64 more