How TO use configurable Database connection with ADF BC

I have developed a simple JSF/ ADF BC web application that connects to a database and read/display data from the db tables. I have successfully deployed the application to Tomcat 5.5.17. However, now i need to change the database the application is connecting to. My question is How can I change the Database connection without having to change the application modules or rebuild the war file ??? In other words, is there a specific file (xml) where the database connection can be changed?

If you set up the application with a data source (I am not sure if this is possible using another app server, I use OC4J), then you would just change it there. However if you created a database connection in the JDEV and pointed your data model to that, then you will have to change and rebuild.
You might be able to edit the xml file that contains the setttings, I am not sure my CM guys dont allow this, all of our changes have to go through our code repository.

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