EJBUser & User

[Kapa]

Hi people,

I'm trying to figure out how to set up a usermanager for my application,
and since the User is supposed to be an EJB, I'm having a look at the
EJBUserManager. But I can't figure out why the User interface is not a
superinterface of the EJBUser interface, and the EJBUSerManager methods
return a User interface.  Any clue?  Is

EJBUser ejbUser = (EJBUser) ejbUserManager.getUser(username)

where ejbUserManager is my EJBUserManager

supposed to work?

Greetings
Diego