Add doxygen

src/md/Potentials.hpp

@@ -13,12 +13,20 @@
 
 #include <cmath>
 
+/**
+ * @brief Potential generator base class
+ *
+ */
 class Potential {
 public:
   virtual double potential(double r) = 0;
-  virtual double force(double r)     = 0;
+  virtual double force(double r) = 0;
 };
 
+/**
+ * @brief Lennard Jones potential generator
+ *
+ */
 class LennardJones : public Potential {
 public:
   double potential(double r) override {