public void insert() throws Exception
{
Resource leftResource = Resource.getResourceById(this.getLeftResourceId());
Resource rightResource = Resource.getResourceById(this.getRightResourceId());
HandlerAbstract handlerLeft = HandlerFactory.factory(leftResource, this.getLeftPath());
HandlerAbstract handlerRight = HandlerFactory.factory(rightResource, this.getRightPath());
// build map
FileMap.generate(handlerRight);