Compile this single file and copy the resulting classfile to the CODEBEAMER_HOME/tomcat/webapps/cb/WEB-INF/classes/com/intland/codebeamer/wiki/plugins directory. You can create this directory if doesn't exist yet.

(You could also repackage your classfiles to the cb-<version-service pack>.jar, but that is a more complicated approach and normally discouraged.)