/usr/ is in libplexus-interpolation-java 1.21-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/maven-repo/org/codehaus/plexus/
/usr/share/
/usr/share/java/
/usr/share/java/plexus-interpolation.jar
/usr/share/doc/
/usr/share/doc/libplexus-interpolation-java/
/usr/share/doc/libplexus-interpolation-java/copyright
/usr/share/doc/libplexus-interpolation-java/changelog.Debian.gz
/usr/share/maven-repo/
/usr/share/maven-repo/org/
/usr/share/maven-repo/org/codehaus/
/usr/share/maven-repo/org/codehaus/plexus/plexus-interpolation/
/usr/share/maven-repo/org/codehaus/plexus/plexus-interpolation/debian/
/usr/share/maven-repo/org/codehaus/plexus/plexus-interpolation/debian/plexus-interpolation-debian.pom
/usr/share/maven-repo/org/codehaus/plexus/plexus-interpolation/1.21/
/usr/share/maven-repo/org/codehaus/plexus/plexus-interpolation/1.21/plexus-interpolation-1.21.pom
/usr/share/java/plexus-interpolation-1.21.jar
/usr/share/maven-repo/org/codehaus/plexus/plexus-interpolation/debian/plexus-interpolation-debian.jar
/usr/share/maven-repo/org/codehaus/plexus/plexus-interpolation/1.21/plexus-interpolation-1.21.jar