Housekeeping for Pattern classes

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1571933 13f79535-47bb-0310-9956-ffa450edef68
Housekeeping for Pattern classes

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1571934 13f79535-47bb-0310-9956-ffa450edef68