Bug 30751 [Viewers] Closing all projects doesnt clear package browser list [browsing]
In the java browsing perspective, if you close all projects, the packages browser still has a list of all the packages from the last opened project.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/StructuredViewer.java
Object object;
		Widget widget;
		boolean fullMap;
		boolean exception = false;
		public void run() {
			if(exception) return;
			doUpdateItem(widget,object,fullMap);
		}
		public void handleException(Throwable e) {
			super.handleException(e);
			
			
			exception = true;
		}		
	} 		
	
/**
 * Creates a structured element viewer. The viewer has no input, 
 * no content provider, a default label provider, no sorter, and no filters.
 */
protected StructuredViewer() {
}
/**
 * Adds a listener for double-clicks in this viewer.
 * Has no effect if an identical listener is already registered.
 *
 * @param listener a double-click listener
 */
public void addDoubleClickListener(IDoubleClickListener listener) {