Update copyright.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/bcel/trunk@1627975 13f79535-47bb-0310-9956-ffa450edef68
Remove unused imports.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/bcel/trunk@1627976 13f79535-47bb-0310-9956-ffa450edef68
Add final modifier to private fields.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/bcel/trunk@1627977 13f79535-47bb-0310-9956-ffa450edef68
Add final modifier to private fields.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/bcel/trunk@1627978 13f79535-47bb-0310-9956-ffa450edef68