4.0.0 LibrarySystem libsys jar 1.0 LibrarySystem http://maven.apache.org junit junit 3.8.1 test org.json org.json chargebee-1.0 org.codehaus.mojo exec-maven-plugin 1.2.1 libsys.Main org.apache.maven.plugins maven-compiler-plugin 3.5 1.6 1.6