CatDAOImpl and DogDAOImpl

package curam.inheritance;

import java.util.Set;

import com.google.inject.Singleton;

import curam.inheritance.Cat;
import curam.inheritance.CatDAO;
import curam.inheritance.struct.CatDtls;
import curam.util.persistence.StandardDAOImpl;

@Singleton
public class CatDAO extends StandardDAOImpl<Cat, CatDtls> implements
    CatDAO {
  private static final CatAdapter adapter = new CatAdapter();

  /**
   * Protected no-arg constructor for use only by Guice
   */
  protected CatDAO() {
    super(adapter, Cat.class);
  }

  public Set<Cat> readAllCats() {
    return newSet(adapter.readAll());
  }

}
package curam.inheritance;

import java.util.Set;

import com.google.inject.Singleton;

import curam.inheritance.Dog;
import curam.inheritance.DogDAO;
import curam.inheritance.struct.DogDtls;
import curam.util.persistence.StandardDAOImpl;

@Singleton
public class DogDAO extends StandardDAOImpl<Dog, DogDtls> implements
    DogDAO {
  private static final DogAdapter adapter = new DogAdapter();

  /**
   * Protected no-arg constructor for use only by Guice
   */
  protected DogDAO() {
    super(adapter, Dog.class);
  }

  public Set<Dog> readAllDogs() {
    return newSet(adapter.readAll());
  }

}