Code doco improvements

git-svn-id: svn+ssh://svn.code.sf.net/p/pcgen/code/Trunk@20875 ef53c05b-3124-4d59-ae7d-fe3273f42be7

https://github.com/pcgen/pcgen/commit/7eb5f8d
Fix for potential NPE

git-svn-id: svn+ssh://svn.code.sf.net/p/pcgen/code/Trunk@20876 ef53c05b-3124-4d59-ae7d-fe3273f42be7

https://github.com/pcgen/pcgen/commit/edec323