/usr/ is in libcastor-core-java 1.3.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/maven-repo/
/usr/share/maven-repo/org/
/usr/share/maven-repo/org/codehaus/
/usr/share/maven-repo/org/codehaus/castor/
/usr/share/maven-repo/org/codehaus/castor/castor-core/
/usr/share/maven-repo/org/codehaus/castor/castor-core/1.3.1/
/usr/share/maven-repo/org/codehaus/castor/castor-core/1.3.1/castor-core-1.3.1.pom
/usr/share/maven-repo/org/codehaus/castor/castor-core/debian/
/usr/share/maven-repo/org/codehaus/castor/castor-core/debian/castor-core-debian.pom
/usr/share/java/
/usr/share/java/castor-core-1.3.1.jar
/usr/share/doc/
/usr/share/doc/libcastor-core-java/
/usr/share/doc/libcastor-core-java/copyright
/usr/share/doc/libcastor-core-java/changelog.Debian.gz
/usr/share/maven-repo/org/codehaus/castor/castor-core/1.3.1/castor-core-1.3.1.jar
/usr/share/maven-repo/org/codehaus/castor/castor-core/debian/castor-core-debian.jar
/usr/share/java/castor-core.jar