Somebody appears to have been confused about the purpose of static
in Java.
These are instance fields and should therefore not be static.

Also reduce the visibility of some methods and fields.

Change-Id: I0b5875b6cbd91ee89823e2058b87c1087dc5c92e
Reviewed-on: https://gerrit.libreoffice.org/3555Reviewed-by: Fridrich Strba <fridrich@documentfoundation.org>
Tested-by: Fridrich Strba <fridrich@documentfoundation.org>