If I configure a hudson project to publish javadoc at the end of a build, Hudson
then provides a view javadoc link. If I never generated javadoc clicking on the
javadoc link will cause a stack trace. IMO the software should do one of the
following:

1. Declare the build a failure if the publish javadoc step can't find javadoc.
2. Supress the view javadoc link if none was published.
3. Replace the stack trace with a simple message that no javadoc was found.