Update Multiplicity.h

Author: ddobrigk

Common/DataModel/Multiplicity.h

@@ -8,6 +8,11 @@
 // In applying this license CERN does not waive the privileges and immunities
 // granted to it by virtue of its status as an Intergovernmental Organization
 // or submit itself to any jurisdiction.
+
+/// \file Multiplicity.h
+/// \brief multiplicity tables
+/// \author ALICE
+
 #ifndef COMMON_DATAMODEL_MULTIPLICITY_H_
 #define COMMON_DATAMODEL_MULTIPLICITY_H_