Code structuring strategy : How to customize application depending on the customer?

[Marius Grama]

I am trying to develop a more complex GWT application with the following frameworks :

- GWTP

- Gin, Guice

The web application is intended to be delivered to several clients, which have each some customizations to be added on top of the standard version of the application :

- personalized login screen , custom user repository

- personalized services for searching customers

Could somebody describe a solution which makes use of GIN/Guice abilities to bind :

- the customer related presenters, instead of the standard presenter

- the customer related services, instead of the standard services

instead of creating separate branches for customer distributions?

I am trying to avoid if possible having a separate project branch for each customer.

Any sugestions in this directions are welcomed.