Vaanila & EJB3

we are going to develop web base banking application, as a front end we selected vaadin.
so we are suppose to select EJB 3 as a back-end.
Is it a good combination?
give some comment on it

note - I refer Internet but still find any documentation regarding this.

For larger applications Vaadin + EJB3/JPA is a commonly used combination. I have seen both EclipseLink as well as Hibernate used as an implementation.

Take a look of this article:
http://vaadin.com/wiki/-/wiki/Main/Adding%20JPA%20to%20the%20Address%20Book%20Demo
.

Also you might want to take a look of
HbnContainer
and this integration example
http://dev.vaadin.com/svn/incubator/SpringApplication/
.