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
else
						rgb= PreferenceConverter.getColor(store, PREFERENCE_COLOR_BACKGROUND);
				}
			}
			rulerColumn.setBackground(manager.getColor(rgb));
			rulerColumn.redraw();
		}
	}
	
	/**
	 * Creates a new line number ruler column that is appropriately initialized.
	 * 
	 * @return a new line number ruler column
	 */
	protected IVerticalRulerColumn createLineNumberRulerColumn() {
		if (isQuickDiffAlwaysOn() || isChangeInformationShowing()) {
			LineNumberChangeRulerColumn column= new LineNumberChangeRulerColumn();
			column.setHover(new JavaChangeHover());
			initializeChangeRulerColumn(column);
			fLineNumberRulerColumn= column;
		} else {
			fLineNumberRulerColumn= new LineNumberRulerColumn();
		}
		initializeLineNumberRulerColumn(fLineNumberRulerColumn);
		return fLineNumberRulerColumn;
	}
	
	/**
	 * Initializes the given change ruler column from the preference store.
	 *