Want to know from which souce file in jabberd,the main application getting started(like Main() in C)

Hii,

I am new to the ejabberd server and i have souce file and lots of souce code are there like ejabberd_receiver.erl
ejabberd_router.erl
ejabberd_s2s.erl
ejabberd_s2s_in.erl
ejabberd_s2s_out.erl
ejabberd_service.erl
ejabberd_sm.erl
ejabberd_socket.erl.
gen_iq_handler.erl
gen_mod.erl
idna.erl
jd2ejd.erl
jlib.erl etc etc.....
I want to know from which souce file,the main application getting started(like Main() in C) and how each file are connected to each other.
Thanks in advance