Bug 185181 [CommonNavigator] NPE from Customize View of Project Explorer
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/NavigatorPlugin.java
* Record a message against this plugin's log. 
	 * 
	 * @param severity
	 * @param aCode
	 * @param aMessage
	 * @param exception
	 */
	public static void log(int severity, int aCode, String aMessage,
			Throwable exception) {
		log(createStatus(severity, aCode, aMessage, exception));
	}
	/**
	 * 
	 * Record a status against this plugin's log. 
	 * 
	 * @param aStatus
	 */
	public static void log(IStatus aStatus) {
		
		logJob.log(aStatus);
		logJob.schedule(LOG_DELAY);
	}
	/**
	 * Create a status associated with this plugin.
	 *  
	 * @param severity
	 * @param aCode
	 * @param aMessage
	 * @param exception
	 * @return A status configured with this plugin's id and the given parameters.