Bug 6638 "Add Method Overrides" menu pick
It would be nice to have an "Add Method Overrides" menu pick (analogous to the "Add Unimplemented Methods" menu pick in certain context menus) that would bring up a selection box of currently-unoverridden base-class methods and insert stubs for the selected methods.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/TypePage.java
* Can be extended to add more validation.
	 */
	protected IStatus superInterfacesChanged() {
		StatusInfo status= new StatusInfo();
		
		IPackageFragmentRoot root= getPackageFragmentRoot();
		fSuperInterfacesDialogField.enableButton(0, root != null);
						
		if (root != null) {
			List elements= fSuperInterfacesDialogField.getElements();
			int nElements= elements.size();
			for (int i= 0; i < nElements; i++) {
				String intfname= (String)elements.get(i);
				try {
					IType type= JavaModelUtil.findType(root.getJavaProject(), intfname);
					if (type == null) {
						status.setWarning(NewWizardMessages.getFormattedString("TypePage.warning.InterfaceNotExists", intfname)); 
						return status;
					} else {
						if (type.isClass()) {
							status.setWarning(NewWizardMessages.getFormattedString("TypePage.warning.InterfaceIsNotInterface", intfname)); 
							return status;
						}
						if (!JavaModelUtil.isVisible(type, getPackageFragment())) {
							status.setWarning(NewWizardMessages.getFormattedString("TypePage.warning.InterfaceIsNotVisible", intfname)); 
							return status;
						}
					}
				} catch (JavaModelException e) {
					JavaPlugin.log(e.getStatus());