/usr/ is in libhtmlunit-java 2.8-1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/java/
/usr/share/java/htmlunit.jar
/usr/share/doc/
/usr/share/doc/libhtmlunit-java/
/usr/share/
/usr/share/maven-repo/
/usr/share/maven-repo/net/
/usr/share/maven-repo/net/sourceforge/
/usr/share/maven-repo/net/sourceforge/htmlunit/
/usr/share/maven-repo/net/sourceforge/htmlunit/htmlunit/
/usr/share/maven-repo/net/sourceforge/htmlunit/htmlunit/2.8/
/usr/share/maven-repo/net/sourceforge/htmlunit/htmlunit/2.8/htmlunit-2.8.pom
/usr/share/maven-repo/net/sourceforge/htmlunit/htmlunit/debian/
/usr/share/maven-repo/net/sourceforge/htmlunit/htmlunit/debian/htmlunit-debian.pom
/usr/share/doc/libhtmlunit-java/copyright
/usr/share/doc/libhtmlunit-java/changelog.Debian.gz
/usr/share/maven-repo/net/sourceforge/htmlunit/htmlunit/2.8/htmlunit-2.8.jar
/usr/share/maven-repo/net/sourceforge/htmlunit/htmlunit/debian/htmlunit-debian.jar
/usr/share/java/htmlunit-2.8.jar