Make factory object public

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1593719 13f79535-47bb-0310-9956-ffa450edef68
Correct access modifiers

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1593720 13f79535-47bb-0310-9956-ffa450edef68