final RowHeaderLayerStack rows = new RowHeaderLayerStack(...);
rows.registerEventHandler(new ILayerEventHandler<RowReorderEvent>() {

    @Override
    public Class<RowReorderEvent> getLayerEventClass() {
        return RowReorderEvent.class;
    }

    @Override
    public void handleLayerEvent(final RowReorderEvent arg0) {
        // Do stuff
    }

});