/usr/share/maven-repo/com/google/code/findbugs/jFormatString/debian/jFormatString-debian.jar is in libjformatstring-java 0.10~20131207-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/maven-repo/com/google/code/findbugs/jFormatString/debian/../../../../../../../java/jFormatString-2.0.2.jar