Possible to generate "ejb-jar.xml" from EJB class (source)? "ejb-jar.xml" appserver independent?

[Raymond Schanks]

Currently I defined manually the ejb-jar.xml for a EJB SessionBean.

Is there a tool which does this automatically for me?
In other words I pass the java source (or binary class) to it and the tool
fetches all necessary information from it and generates the suitable ejb-jar.xml.

By the way: is the definition of ejb-jar.xml Application Server independent?
Can I use the same ejb-jar.xml for deployment on JBoss or TomCat or Jetty or WebSphere?

Ray