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
/**
	 * Initializes the given line number ruler column from the preference store.
	 * 
	 * @param rulerColumn the ruler column to be initialized
	 */
	protected void initializeLineNumberRulerColumn(LineNumberRulerColumn rulerColumn) {
		JavaTextTools textTools= JavaPlugin.getDefault().getJavaTextTools();
		IColorManager manager= textTools.getColorManager();	
		
		IPreferenceStore store= getPreferenceStore();
		if (store != null) {
		
			RGB rgb=  null;
			
			if (store.contains(LINE_NUMBER_COLOR)) {
				if (store.isDefault(LINE_NUMBER_COLOR))
					rgb= PreferenceConverter.getDefaultColor(store, LINE_NUMBER_COLOR);
				else
					rgb= PreferenceConverter.getColor(store, LINE_NUMBER_COLOR);
			}
			rulerColumn.setForeground(manager.getColor(rgb));
			
			
			rgb= null;
			
			if (!store.getBoolean(PREFERENCE_COLOR_BACKGROUND_SYSTEM_DEFAULT)) {
				if (store.contains(PREFERENCE_COLOR_BACKGROUND)) {
					if (store.isDefault(PREFERENCE_COLOR_BACKGROUND))
						rgb= PreferenceConverter.getDefaultColor(store, PREFERENCE_COLOR_BACKGROUND);