drools-eclipse/org.guvnor.tools/src/org/guvnor/tools/Activator.java
public void stop(BundleContext context) throws Exception {
        plugin = null;
        super.stop(context);
        getWorkspace().removeResourceChangeListener(rcListner);

    }
public void stop(BundleContext context) throws Exception {
        plugin = null;
        super.stop(context);
        getWorkspace().removeResourceChangeListener(rcListner);

    }
/*
(non-Javadoc)
@see org.eclipse.ui.plugin.AbstractUIPlugin#stop(org.osgi.framework.BundleContext)