/usr/share/java/jsr305.jar is in libjsr305-java 0.1~+svn49-10.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/jsr305-0.1~+svn49.jar
/usr/share/java/jsr305-0.1~+svn49.jar