Simple way to add a file that can show up in "other source" of a project?

Working with OSGI and the bnd plugin, and working with a bnd.bnd file.

But the only way to access this file from the IDE is via the Files tab.

Is there any way to tell NB that bnd.bnd is OK to show up in the Other
Sources branch of the project tree (or Project Files, I'm not picky)?

Regards,

Will Hartung