This error occurs when the time to set up the broker that requests the "add_job" is the same time in "add_job" event
Exception in thread "main" java.lang.NullPointerException
at br.edu.ufcg.lsd.oursim.events.broker.AddJobEvent.process(AddJobEvent.java:34)
at br.edu.ufcg.lsd.oursim.OurSim.run(OurSim.java:65)
at br.edu.ufcg.lsd.oursim.Main.main(Main.java:31)