When defining modules in IntelliJ currently it is possible to define inclusion/exclusion of files only via folders. It would be highly useful if it were possible to specify inclusion exclusion/filters for including/excluding files. There are a number of points here:
1. Filters could be listed separately, along with a list of generic filter (e.g. */.java, */.xml, etc.) giving users the power to reuse specific filtersets across multiple modules/content roots.
2. A module currently includes all file types within the content roots. Allowing filters would give developers the power to define content roots / modules that only include xml files, or jsps, etc.