/usr/share/java/hsqldb1.8.0.jar is in libhsqldb1.8.0-java 1.8.0.10+dfsg-3ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/hsqldb1.8.0-1.8.0.10+dfsg.jar
/usr/share/java/hsqldb1.8.0-1.8.0.10+dfsg.jar