[#5818] - NPE when first clicking on a new created group

After creating a new group, without adding the Group header and Group Footer, when first clicking on the new group in the Outline view, a NullPointerException is generated.
The exception message in the log file:
!ENTRY com.jaspersoft.studio.properties 4 2 2012-07-02 15:25:48.885
!MESSAGE Problems occurred when invoking code from plug-in: "com.jaspersoft.studio.properties".
!STACK 0
java.lang.NullPointerException
at com.jaspersoft.studio.property.section.band.BandGroupSection.createControls(Unknown Source)
at com.jaspersoft.studio.properties.view.TabContents$1.run(Unknown Source)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)
at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)
at com.jaspersoft.studio.properties.view.TabContents.createControls(Unknown Source)
at com.jaspersoft.studio.properties.view.TabbedPropertySheetPage$SelectionChangedListener.selectionChanged(Unknown Source)
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:1053)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:774)
at com.jaspersoft.studio.properties.internal.TabbedPropertyList.select(Unknown Source)
at com.jaspersoft.studio.properties.internal.TabbedPropertyViewer.setSelectionToWidget(Unknown Source)
at org.eclipse.jface.viewers.StructuredViewer.setSelectionToWidget(StructuredViewer.java:1767)
at org.eclipse.jface.viewers.StructuredViewer.setSelection(StructuredViewer.java:1723)
at org.eclipse.jface.viewers.Viewer.setSelection(Viewer.java:394)
at com.jaspersoft.studio.properties.view.TabbedPropertySheetPage.setInput(Unknown Source)
at com.jaspersoft.studio.properties.view.TabbedPropertySheetPage.selectionChanged(Unknown Source)
at org.eclipse.ui.views.properties.PropertySheet.selectionChanged(PropertySheet.java:363)
at org.eclipse.ui.internal.AbstractSelectionService.firePostSelection(AbstractSelectionService.java:179)
at org.eclipse.ui.internal.AbstractSelectionService$2.selectionChanged(AbstractSelectionService.java:71)
at org.eclipse.ui.part.PageBookView$5.run(PageBookView.java:255)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.runtime.Platform.run(Platform.java:888)
at org.eclipse.ui.part.PageBookView$SelectionManager.selectionChanged(PageBookView.java:253)
at org.eclipse.ui.part.PageBookView$SelectionProvider.postSelectionChanged(PageBookView.java:329)
at org.eclipse.ui.part.PageBookView.postSelectionChanged(PageBookView.java:910)
at org.eclipse.ui.part.PageBookView.access$3(PageBookView.java:905)
at org.eclipse.ui.part.PageBookView$3.selectionChanged(PageBookView.java:172)
at com.jaspersoft.studio.editor.outline.page.MultiOutlineView.setSelection(Unknown Source)
at com.jaspersoft.studio.editor.outline.page.MultiOutlineView.selectionChanged(Unknown Source)
at org.eclipse.gef.ui.parts.AbstractEditPartViewer.fireSelectionChanged(AbstractEditPartViewer.java:247)
at org.eclipse.gef.ui.parts.TreeViewer.fireSelectionChanged(TreeViewer.java:171)
at org.eclipse.gef.ui.parts.AbstractEditPartViewer$1.run(AbstractEditPartViewer.java:131)
at org.eclipse.gef.SelectionManager.fireSelectionChanged(SelectionManager.java:144)
at org.eclipse.gef.SelectionManager.setSelection(SelectionManager.java:279)
at org.eclipse.gef.ui.parts.AbstractEditPartViewer.setSelection(AbstractEditPartViewer.java:751)
at org.eclipse.gef.ui.parts.TreeViewer$1.widgetSelected(TreeViewer.java:196)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:240)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4165)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2701)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2665)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2499)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:679)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:668)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at com.jaspersoft.studio.rcp.intro.Application.start(Unknown Source)
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:344)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
at org.eclipse.equinox.launcher.Main.main(Main.java:1386)