wsdl:fault

I read in Basic Profile specs
"A Web service description should include all faults known at the time the service is defined."

I'm using the sws wsdl generating feature, so I wonder what should be the best way to add fault element to my wsdl? should I extend the DefaultWsdl11Definition class? is there a better way?

I found some threads speaking about this need, but without responses
http://forum.springsource.org/showth...t=wsdl%3Afault
http://forum.springsource.org/showth...t=wsdl%3Afault
http://forum.springsource.org/showth...oap+fault+wsdl