Just to let you know I have written a tool that generates code from the
database and one of the plugin, called "EJB3AndHibernateDao" generates
code based on this pattern.

It generates a pojo or an ejb3 for each table, a generic dao for each
pojo and an hibernate implementation of this dao.

See http://salto-db.sourceforge.net/salto-db-generator/index.html and
http://salto-db.sourceforge.net/salto-db-generator/plugins/ejb3hibernatedao.html

Thanks a lot for this article.