Bug 41443 overview ruler not working
smoke test for 20030812 The overview ruler in the Java editor does not work when starting with a fresh workspace as described in the smoke test scenario.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
* @since R3.0
	 */
	protected IChangeRulerColumn createChangeRulerColumn() {
		IChangeRulerColumn column= new ChangeRulerColumn();
		column.setHover(new JavaChangeHover());
		fChangeRulerColumn= column;
		initializeChangeRulerColumn(fChangeRulerColumn);
		return fChangeRulerColumn;
	}
	
	/*
	 * @see AbstractTextEditor#createVerticalRuler()
	 */
	protected IVerticalRuler createVerticalRuler() {
		CompositeRuler ruler= new CompositeRuler();
		ruler.addDecorator(0, new AnnotationRulerColumn(VERTICAL_RULER_WIDTH));
		
		if (isLineNumberRulerVisible())
			ruler.addDecorator(1, createLineNumberRulerColumn());
		else if (isQuickDiffAlwaysOn())
			ruler.addDecorator(1, createChangeRulerColumn());
			
		return ruler;
	}
	
	/*
	 * @see org.eclipse.ui.texteditor.AbstractTextEditor#updatePropertyDependentActions()
	 */
	protected void updatePropertyDependentActions() {
		super.updatePropertyDependentActions();