Module desired technologies question

Once again I want to thank you for this great product that you are offering to us.
I have Intellij Ultimate 12 latest version and I am using the new module menu option to add a module to an existing project.
To be more precise I am creating a jsp web site that uses a java bean.
What I want to know is what technology should I add to the module at the second step of the wizard(at the first step I have chosen 'Java Module').
I know that Application Server technology is mandatory to be able to run a jsp page but what about the other options like 'Web Application' or 'Enterprise Javabeans' or 'JavaEE application'.
What do they offer to the module?