/usr/share/maven-repo/org/apache/tomcat/tomcat-websocket/ is in libtomcat8-java 8.0.14-1+deb8u11.
This file is owned by root:root, with mode 0o755.
..
/usr/share/maven-repo/org/apache/tomcat/tomcat-websocket-api/8.0.14/
/usr/share/maven-repo/org/apache/tomcat/tomcat-websocket-api/8.0.14/tomcat-websocket-api-8.0.14.jar
/usr/share/maven-repo/org/apache/tomcat/tomcat-websocket-api/8.0.14/tomcat-websocket-api-8.0.14.pom
/usr/share/maven-repo/org/apache/tomcat/tomcat-websocket-api/8.x/
/usr/share/maven-repo/org/apache/tomcat/tomcat-websocket-api/8.x/tomcat-websocket-api-8.x.jar
/usr/share/maven-repo/org/apache/tomcat/tomcat-websocket-api/8.x/tomcat-websocket-api-8.x.pom
/usr/share/maven-repo/org/apache/tomcat/tomcat-websocket/8.0.14/
/usr/share/maven-repo/org/apache/tomcat/tomcat-websocket/8.0.14/tomcat-websocket-8.0.14.jar
/usr/share/maven-repo/org/apache/tomcat/tomcat-websocket/8.0.14/tomcat-websocket-8.0.14.pom
/usr/share/maven-repo/org/apache/tomcat/tomcat-websocket/8.x/
/usr/share/maven-repo/org/apache/tomcat/tomcat-websocket/8.x/tomcat-websocket-8.x.jar
/usr/share/maven-repo/org/apache/tomcat/tomcat-websocket/8.x/tomcat-websocket-8.x.pom