code: public int getEnergies(IBond bond) {
          int dKJPerMol = -1;
          for (Map.Entry<Integer, BondEnergy> entry : bondEngergies.entrySet()) {
              BondEnergy bondEnergy = entry.getValue();
              if (bondEnergy.matches(bond)) {
                  dKJPerMol = bondEnergy.getEnergy();
              }
          }
          return dKJPerMol;
      }
docs: Returns bond energy for a bond type, given atoms and bond type
  @param bond (single, double etc)
  @return bond energy