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To get event content to edmDumpEventContent of your AOD file

edmDumpEventContent 06688145-E89E-E211-9845-002590593876.root

For only info on certain type use regex

edmDumpEventContent 06688145-E89E-E211-9845-002590593876.root --regex gen

Type                                  Module                     Label      Process   
--------------------------------------------------------------------------------------
GenEventInfoProduct                   "generator"                ""         "SIM"     
vector<int>                           "genParticles"             ""         "SIM"     
vector<reco::GenJet>                  "ak5GenJets"               ""         "SIM"     
vector<reco::GenJet>                  "ak7GenJets"               ""         "SIM"     
vector<reco::GenJet>                  "kt4GenJets"               ""         "SIM"     
vector<reco::GenJet>                  "kt6GenJets"               ""         "SIM"     
vector<reco::GenMET>                  "genMetCalo"               ""         "SIM"     
vector<reco::GenMET>                  "genMetCaloAndNonPrompt"   ""         "SIM"     
vector<reco::GenMET>                  "genMetTrue"               ""         "SIM"     
vector<reco::GenParticle>             "genParticles"             ""         "SIM"     
vector<reco::Track>                   "generalTracks"            ""         "RECO"    

You then need you own analyzer. Check out Writing your own EDAnalyzer

Google your class reference to see the functions of the class. For instance “reco::GenParticle reference” gives you the page reco::GenParticle class reference