Use RDFDataMgr, not FileManager.

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1536011 13f79535-47bb-0310-9956-ffa450edef68
Unused, untested.

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1536012 13f79535-47bb-0310-9956-ffa450edef68
Remove unused static field.

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1536013 13f79535-47bb-0310-9956-ffa450edef68
Remove commented junk.

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1536014 13f79535-47bb-0310-9956-ffa450edef68