Bug 284319 Remove empty Activators and replace Activator.ID Strings with dynamic Bundle symbolic name
I have deleted empty Activators and replaced the String literal of ID with FrameworkUtil.getBundle(...class).getSymbolicName().
bundles/org.eclipse.e4.ui.workbench.renderers.swt/src/org/eclipse/e4/workbench/ui/renderers/swt/Activator.java
private static Activator activator = null;
	public static Activator getDefault() {
		return activator;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.osgi.framework.BundleActivator#start(org.osgi.framework.BundleContext
	 * )
	 */
	public void start(BundleContext context) throws Exception {
		activator = this;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.osgi.framework.BundleActivator#stop(org.osgi.framework.BundleContext)
	 */
	public void stop(BundleContext context) throws Exception {
		activator = null;
	}
}