diff --git a/corsika/detail/modules/proposal/HadronicPhotonModel.inl b/corsika/detail/modules/proposal/HadronicPhotonModel.inl
index 2b63b7a52e1b32191689559b77cd82950815a74a..1d47b2f8f816208f92eacee64f638629848c5335 100644
--- a/corsika/detail/modules/proposal/HadronicPhotonModel.inl
+++ b/corsika/detail/modules/proposal/HadronicPhotonModel.inl
@@ -1,13 +1,16 @@
+/*
+ * (c) Copyright 2022 CORSIKA Project, corsika-project@lists.kit.edu
+ *
+ * This software is distributed under the terms of the GNU General Public
+ * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
+ * the license.
+ */
+
 #pragma once
 
-//#include <corsika/media/IMediumModel.hpp>
-//#include <corsika/media/NuclearComposition.hpp>
 #include <corsika/framework/core/PhysicalUnits.hpp>
 #include <corsika/framework/core/EnergyMomentumOperations.hpp>
 
-//#include <limits>
-//#include <memory>
-//#include <random>
 #include <tuple>
 
 namespace corsika::proposal {
diff --git a/corsika/modules/proposal/HadronicPhotonModel.hpp b/corsika/modules/proposal/HadronicPhotonModel.hpp
index 08c94d510e47998bdb3a5908cc3330faa60e6d6c..a3d9b606436491868cd6979c7822f594df86416b 100644
--- a/corsika/modules/proposal/HadronicPhotonModel.hpp
+++ b/corsika/modules/proposal/HadronicPhotonModel.hpp
@@ -14,6 +14,13 @@
 
 namespace corsika::proposal {
 
+  //! Implements the production of secondary hadrons for the hadronic interaction of real
+  //! and virtual photons. At high energies an external model
+  //! is needed that implements the doInteraction(TSecondaries& view, Code const
+  //! projectile, Code const target,FourMomentum const& projectileP4, FourMomentum const&
+  //! targetP4) routine. Low energy interactions are currently not implemented.
+  //! @tparam THadronicModel
+
   template <class THadronicModel>
   class HadronicPhotonModel {
   public:
@@ -29,7 +36,7 @@ namespace corsika::proposal {
   private:
     THadronicModel& heHadronicInteraction_;
     static HEPEnergyType constexpr heHadronicModelThresholdLab_ =
-        80. * 1e9 * electronvolt;
+        80. * 1e9 * electronvolt; //!< energy threshold between LE and HE model
   };
 } // namespace corsika::proposal