Thanks for Open Sourcing IntelliJ IDEA. It's come in really handy now that I'm creating facets for the NetBeans Platform and NetBeans modules (at some point, for OSGi bundles too, I think). Here you can learn how to create Facets
, simply by reading the facet for Groovy.
Without the Groovy facet, I would have been totally lost. I doubt that, now that that Groovy facet is available in the open source, a tutorial on facets is even needed. Simply read the Groovy facet and adapt it to your own purposes, as I did here:
Open source rocks!