/usr/ is in libecj-java 3.13.3-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/doc/
/usr/share/doc/libecj-java/
/usr/share/doc/libecj-java/changelog.Debian.gz
/usr/share/doc/libecj-java/copyright
/usr/share/java/
/usr/share/java/eclipse-ecj-3.13.2.jar
/usr/share/maven-repo/
/usr/share/maven-repo/org/
/usr/share/maven-repo/org/eclipse/
/usr/share/maven-repo/org/eclipse/jdt/
/usr/share/maven-repo/org/eclipse/jdt/core/
/usr/share/maven-repo/org/eclipse/jdt/core/compiler/
/usr/share/maven-repo/org/eclipse/jdt/core/compiler/ecj/
/usr/share/maven-repo/org/eclipse/jdt/core/compiler/ecj/3.13.2/
/usr/share/maven-repo/org/eclipse/jdt/core/compiler/ecj/3.13.2/ecj-3.13.2.pom
/usr/share/maven-repo/org/eclipse/jdt/core/compiler/ecj/debian/
/usr/share/maven-repo/org/eclipse/jdt/core/compiler/ecj/debian/ecj-debian.pom
/usr/share/maven-repo/org/eclipse/jdt/ecj/
/usr/share/maven-repo/org/eclipse/jdt/ecj/debian/
/usr/share/maven-repo/org/eclipse/jdt/ecj/debian/ecj-debian.pom
/usr/share/java/ecj.jar
/usr/share/java/eclipse-ecj.jar
/usr/share/maven-repo/org/eclipse/jdt/core/compiler/ecj/3.13.2/ecj-3.13.2.jar
/usr/share/maven-repo/org/eclipse/jdt/core/compiler/ecj/debian/ecj-debian.jar