GetParamManager() method checks now if JPetParamManager is created, if it is not a case returns reference to  JPetParamManager NullObject
GetParamManager() method checks now if JPetParamManager
is created, if it is not a case returns reference to  JPetParamManager
NullObject


Former-commit-id: 7b95638a35fb05375361e74bd12916d3e5f44588
kmuzalewska/j-pet-framework,kmuzalewska/j-pet-framework,kmuzalewska/j-pet-framework,kmuzalewska/j-pet-framework,kmuzalewska/j-pet-framework