/usr/share/java/jtidy.jar is in libjtidy-java 7+svn20110807-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/../maven-repo/net/sf/jtidy/jtidy/8.0-alpha-20110807/jtidy-8.0-alpha-20110807.jar