EAR project produces application.xml, but EJB module is missing

[Markus KARG]

Maven 3.0.4 is producing application.xml containing <module> entries for
some dependencies (RAR modules), but which is missing <module> entries for
other dependencies (EJB modules). This is weird as the pom more or less is
empty. It just contains the dependencies (RAR modules and EJB modules) and
Java EE version (6). So I assume one cannot do wrong. Is that a bug in Maven
or what the heck is the trick to get <module> entries for EJB modules?