Please package "Scala IDE for Eclipse" ( https://github.com/scala-ide/scala-ide ). As far as I can tell, it seems to be the standard tool for writing code in Scala (dev-lang/scala), which is a pretty popular language, so it seems like something we should have in Gentoo. Should probably be assigned to the Java herd (?)
I have written a similar ebuild for installing Scala IDE which is laying around in my overlay. Will add it to the tree and set myself as maintainer.
+*scala-ide-4.1.0 (28 Jun 2015) + + 28 Jun 2015; Patrice Clement <monsieurp@gentoo.org> +metadata.xml, + +scala-ide-4.1.0.ebuild: + Introducing Scala IDE to Portage. Fix bug 482724. Note: this ebuild won't build Scala IDE from scratch but rather, install a precompiled binary fetched from scala-ide.org. Enjoy!