Per changes in jdom slotting, now that v1 is finalized and v2 is out. Please update the dependency to depend on the v1 slot jdom:0. This might have a circular dependency issue like in bug 378741.
I'll keep this one open cause netbeans is a beast. Miroslav, can you sort it out? It should be trivial. Assigning it to you cause you're our Netbeans expert. ;)
*netbeans-java-8.0.2-r3 (16 Jun 2015) 16 Jun 2015; Miroslav Šulc <fordfrog@gentoo.org> +netbeans-java-8.0.2-r3.ebuild: switched to jdom:0 per bug #543966