Bug 139986 [CommonNavigator] Convert catch(Error/Throwable) to SafeRunner
In several places the CN framework uses catch(Error/Throwable) to ensure that code does not bring the framework down. Change these to use SafeRunner.
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/navigator/CommonNavigator.java
*    have an adapter for the given class
	 */
	public Object getAdapter(Class adapter) {
		if (adapter == COMMON_VIEWER_CLASS) {
			return getCommonViewer();
		} else if (adapter == INAVIGATOR_CONTENT_SERVICE) {
			return getCommonViewer().getNavigatorContentService();
		} else if (adapter == ISHOW_IN_TARGET_CLASS) {
			return this;
		} else if (adapter == ISHOW_IN_SOURCE_CLASS) {
            return getShowInSource();
        }
		return super.getAdapter(adapter);
	}
    /**
     * Returns the <code>IShowInSource</code> for this view.
     */
    private IShowInSource getShowInSource() {
        return new IShowInSource() {
            public ShowInContext getShowInContext() {
                return new ShowInContext(getCommonViewer().getInput(), getCommonViewer().getSelection());
            }
        };
    }
	/**
	 * @return The Navigator Content Service which populates this instance of
	 *         Common Navigator
	 */
	public NavigatorActionService getNavigatorActionService() {
		return commonManager.getNavigatorActionService();