Authentication with UME separation of front end and back end

My webdynpro project has 2 application. One for Admin one for Rating.

Is it possible to create a java class at Webdynpro level and share it between the 2 applications?

Why the need?

Created a custom class (lets called it CommonEJB), to point to the right pages and set of UI controls after the initial login with UME. This class utilizes the IWDClientUser.getSAPUset() method to get IUser object.

If it is not possible to create a java class at Webdynpro, then this ejb will need to be deployed to the backend.

Putting it at the backend is not good as security wise, its always better to separate the authentication between front and back end.

Any ideas/solutions?

thanks