LUCENE-5699 - fixed javadoc

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1619699 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5736 - added caching version of NB classifier

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1619700 13f79535-47bb-0310-9956-ffa450edef68