This is not supported out of the box at the moment (please file an issue if you need this functionality).
However you can do it by writing and overriding your own implementation of org.jvnet.hyperjaxb3.ejb.strategy.annotate.AnnotateOutline
. See https://svn.java.net/svn/hj3~svn/trunk/ejb/tests/custom-naming/ for an example of overriding a strategy.
But be aware that Hyperjaxb has to use getters/setters to workaround some of the JAXB/JPA incompatibilities (for example simple type which is not supported by JPA). If you put annotations on fields, this won't work.