Hi,
The easiest way on Tomcat is to configure Tomcat’s JULI logging which the engine integrates with by default. So you would use the Tomcat distribution as is and add your logging configuration to ${TOMCAT_HOME}/conf/logging.properties For example:
org.camunda.bpm.engine.jobexecutor.level=FINE
org.camunda.bpm.engine.jobexecutor.handlers=1catalina.org.apache.juli.AsyncFileHandler
edit: Details on logging in Tomcat here: https://tomcat.apache.org/tomcat-8.0-doc/logging.html
Cheers,
Thorben