Separation of code

What are some of the approaches people have taken to separate their code from the functionality provided by JSP? 

My main concern is the collision of models. I don't want to have to do a lot of work if JSP introduces a model with the same name since it has already occupied the main namespace.

Has anyone tried isolating their code in a namespace?

There would still be some common areas to modify but having your code in a namespace might mitigate the damage.

I am curious to see how other people are handling this and if it has even been an issue at all.