It's possible that the java-parser may not support parsing of package-info.java classes.
Could you please open a JIRA and attach a test case in https://issues.jboss.org/browse/FORGE ?
Looks like you found a use-case that we haven't covered yet! This is an interesting scenario. As George said, if you could please create a JIRA, we will try to investigate this issue when we can. Otherwise, I know you've already helped us quite a bit, but would you be interested in investigating possible solutions for this? That would help it move a lot more quickly!
Awesome, thank you!