code: private void init(String xmlPath) throws MalformedURLException, IOException{
  		
  		XML xml = new XML(true, xmlPath);
  		if(!xml.isInheritedMapped(configuredClass))
  			Error.classNotMapped(configuredClass);
  		
  		for (Class<?> classe :getClasses(xml)){
  			relationalManyToOneMapper.put(classe.getName(), new JMapper(configuredClass, classe,ChooseConfig.DESTINATION, xmlPath));
  			relationalOneToManyMapper.put(classe.getName(), new JMapper(classe, configuredClass,ChooseConfig.SOURCE, xmlPath));
  		}
  	}
docs: This method initializes relational maps starting from XML.
  @param xmlPath xml path
  @throws MalformedURLException
  @throws IOException