code: public Object find(Class clazz, Object identifier) {
          try {
              return persistenceManager.findById(clazz, identifier);
          } catch (InitializationException ignore){}
          catch (Exception e) {
              e.printStackTrace();
          }
  
          return null;
      }
docs: Find an entity with a given type and primary key
  
  @param clazz Entity type
  @param identifier Entity's primary key
  @return Object within database if found