Eclipse Team has a preference for denoting whether a new file added to version control should be text or binary, and another preference to denote whether it should be ignored for version control. These preferences are file name extension based.

Eclipse ships with a default set. The set can be added to via extension points in org.eclipse.team.core. (extension point ID's are fileTypes and ignore respectively). This default set is not intended to be comprehensive: each plugin which introduces a new file type should add to the list as appropriate.

You may find that your team works with files which are neither in the default set nor are added by another plugin. While you can add to the preference via the preference page, each team member will have to do the same.

Another way to build up your own list is to create a very small plugin that extends these two extension points with the file patterns you care about. This plugin can then be shared with your team; each team member simply needs to drop it into their /plugins directory to get them. This also ensures you share the same set across different workspaces which all use the same plugins directory.