How to use maven-jaxb2-plugin generate toString() method .

Anyone know how to add maven-jaxb2-plugin to front-end ejb module, so that it generate toString() method for backend java bean? The issue I am facing with is currently the toString method is not generated by jaxws mapping during execution of maven in the front-end of the project. So whenever I need to print debugging message, I found no toString on java bean that is mapped by jaxws. I tried this: http://confluence.highsource.org/display/J2B/JAXB2+Basics+Plugins but it produced error: [ERROR] Failed to execute goal [login to view URL]:maven-jaxb2-plugin:0.7.0:generate (default) on project morfeusflex-client2-ejb: Error parsing the command line [[[login to view URL];@7c004572]: grammar is not specified -> [Help 1] if you konw how to fix this, let me know. I will pay $10 for this resolution.