drools-eclipse/org.drools.eclipse/src/main/java/org/drools/eclipse/DroolsEclipsePlugin.java
public void stop(BundleContext context) throws Exception {
        super.stop( context );
        plugin = null;
        resourceBundle = null;
        parsedRules = null;
        compiledRules = null;
        processInfos = null;
        processInfosById = null;
        for (Color color: colors.values()) {
            color.dispose();
        }
    }
public void stop(BundleContext context) throws Exception {
        super.stop( context );
        plugin = null;
        resourceBundle = null;
        parsedRules = null;
        compiledRules = null;
        processInfos = null;
        processInfosById = null;
        for (Color color: colors.values()) {
            color.dispose();
        }
    }
This method is called when the plug-in is stopped