task done

src/main/java/core/basesyntax/dao/impl/CommentDaoImpl.java

@@ -3,7 +3,9 @@
 import core.basesyntax.dao.CommentDao;
 import core.basesyntax.model.Comment;
 import java.util.List;
+import org.hibernate.Session;
 import org.hibernate.SessionFactory;
+import org.hibernate.Transaction;
 
 public class CommentDaoImpl extends AbstractDao implements CommentDao {
     public CommentDaoImpl(SessionFactory sessionFactory) {
@@ -12,21 +14,66 @@ public CommentDaoImpl(SessionFactory sessionFactory) {
 
     @Override
     public Comment create(Comment entity) {
-        return null;
+        Session session = factory.openSession();
+        Transaction transaction = null;
+        try {
+            transaction = session.beginTransaction();
+            session.save(entity);
+            transaction.commit();
+            return entity;
+        } catch (Exception e) {
+            if (transaction != null) {
+                transaction.rollback();
+            }
+            throw new RuntimeException("Can't insert comment entity", e);
+        } finally {
+            session.close();
+        }
     }
 
     @Override
     public Comment get(Long id) {
-        return null;
+        Session session = factory.openSession();
+        try {
+            Comment comment = session.get(Comment.class, id);
+            return comment;
+        } catch (Exception e) {
+            throw new RuntimeException("Can't get comment by id" + id, e);
+        } finally {
+            session.close();
+        }
     }
 
     @Override
     public List<Comment> getAll() {
-        return null;
+        Session session = factory.openSession();
+        try {
+            return session.createQuery("FROM Comment", Comment.class).getResultList();
+        } catch (Exception e) {
+            throw new RuntimeException("Can't get list of comments", e);
+        } finally {
+            session.close();
+        }
     }
 
     @Override
     public void remove(Comment entity) {
-
+        Session session = factory.openSession();
+        Transaction transaction = null;
+        try {
+            transaction = session.beginTransaction();
+            Comment comment = session.get(Comment.class, entity.getId());
+            if (comment != null) {
+                session.remove(comment);
+            }
+            transaction.commit();
+        } catch (Exception e) {
+            if (transaction != null) {
+                transaction.rollback();
+            }
+            throw new RuntimeException("Can't delete comment entity", e);
+        } finally {
+            session.close();
+        }
     }
 }

src/main/java/core/basesyntax/dao/impl/MessageDaoImpl.java

@@ -3,7 +3,9 @@
 import core.basesyntax.dao.MessageDao;
 import core.basesyntax.model.Message;
 import java.util.List;
+import org.hibernate.Session;
 import org.hibernate.SessionFactory;
+import org.hibernate.Transaction;
 
 public class MessageDaoImpl extends AbstractDao implements MessageDao {
     public MessageDaoImpl(SessionFactory sessionFactory) {
@@ -12,21 +14,63 @@ public MessageDaoImpl(SessionFactory sessionFactory) {
 
     @Override
     public Message create(Message entity) {
-        return null;
+        Session session = factory.openSession();
+        Transaction transaction = null;
+        try {
+            transaction = session.beginTransaction();
+            session.save(entity);
+            transaction.commit();
+            return entity;
+        } catch (Exception e) {
+            if (transaction != null) {
+                transaction.rollback();
+            }
+            throw new RuntimeException("Can't insert message entity", e);
+        } finally {
+            session.close();
+        }
     }
 
     @Override
     public Message get(Long id) {
-        return null;
+        Session session = factory.openSession();
+        try {
+            Message message = session.get(Message.class, id);
+            return message;
+        } catch (Exception e) {
+            throw new RuntimeException("Can't get message by id " + id, e);
+        } finally {
+            session.close();
+        }
     }
 
     @Override
     public List<Message> getAll() {
-        return null;
+        Session session = factory.openSession();
+        try {
+            return session.createQuery("FROM Message", Message.class).getResultList();
+        } catch (Exception e) {
+            throw new RuntimeException("Can't get list of messages", e);
+        } finally {
+            session.close();
+        }
     }
 
     @Override
     public void remove(Message entity) {
-
+        Session session = factory.openSession();
+        Transaction transaction = null;
+        try {
+            transaction = session.beginTransaction();
+            session.remove(session.get(Message.class, entity.getId()));
+            transaction.commit();
+        } catch (Exception e) {
+            if (transaction != null) {
+                transaction.rollback();
+            }
+            throw new RuntimeException("Can't delete message entity", e);
+        } finally {
+            session.close();
+        }
     }
 }

src/main/java/core/basesyntax/dao/impl/MessageDetailsDaoImpl.java

@@ -2,7 +2,9 @@
 
 import core.basesyntax.dao.MessageDetailsDao;
 import core.basesyntax.model.MessageDetails;
+import org.hibernate.Session;
 import org.hibernate.SessionFactory;
+import org.hibernate.Transaction;
 
 public class MessageDetailsDaoImpl extends AbstractDao implements MessageDetailsDao {
     public MessageDetailsDaoImpl(SessionFactory sessionFactory) {
@@ -11,11 +13,32 @@ public MessageDetailsDaoImpl(SessionFactory sessionFactory) {
 
     @Override
     public MessageDetails create(MessageDetails entity) {
-        return null;
+        Session session = factory.openSession();
+        Transaction transaction = null;
+        try {
+            transaction = session.beginTransaction();
+            session.save(entity);
+            transaction.commit();
+            return entity;
+        } catch (Exception e) {
+            if (transaction != null) {
+                transaction.rollback();
+            }
+            throw new RuntimeException("Can't insert message details entity", e);
+        } finally {
+            session.close();
+        }
     }
 
     @Override
     public MessageDetails get(Long id) {
-        return null;
+        Session session = factory.openSession();
+        try {
+            return session.get(MessageDetails.class, id);
+        } catch (Exception e) {
+            throw new RuntimeException("Can't get message details by id " + id, e);
+        } finally {
+            session.close();
+        }
     }
 }

src/main/java/core/basesyntax/dao/impl/SmileDaoImpl.java

@@ -3,7 +3,9 @@
 import core.basesyntax.dao.SmileDao;
 import core.basesyntax.model.Smile;
 import java.util.List;
+import org.hibernate.Session;
 import org.hibernate.SessionFactory;
+import org.hibernate.Transaction;
 
 public class SmileDaoImpl extends AbstractDao implements SmileDao {
     public SmileDaoImpl(SessionFactory sessionFactory) {
@@ -12,16 +14,44 @@ public SmileDaoImpl(SessionFactory sessionFactory) {
 
     @Override
     public Smile create(Smile entity) {
-        return null;
+        Session session = factory.openSession();
+        Transaction transaction = null;
+        try {
+            transaction = session.beginTransaction();
+            session.save(entity);
+            transaction.commit();
+            return entity;
+        } catch (Exception e) {
+            if (transaction != null) {
+                transaction.rollback();
+            }
+            throw new RuntimeException("Can't insert smile entity", e);
+        } finally {
+            session.close();
+        }
     }
 
     @Override
     public Smile get(Long id) {
-        return null;
+        Session session = factory.openSession();
+        try {
+            return session.get(Smile.class, id);
+        } catch (Exception e) {
+            throw new RuntimeException("Can't get smail by id " + id, e);
+        } finally {
+            session.close();
+        }
     }
 
     @Override
     public List<Smile> getAll() {
-        return null;
+        Session session = factory.openSession();
+        try {
+            return session.createQuery("FROM Smile", Smile.class).getResultList();
+        } catch (Exception e) {
+            throw new RuntimeException("Can't get list of comments", e);
+        } finally {
+            session.close();
+        }
     }
 }

src/main/java/core/basesyntax/dao/impl/UserDaoImpl.java

@@ -1,9 +1,12 @@
 package core.basesyntax.dao.impl;
 
 import core.basesyntax.dao.UserDao;
+import core.basesyntax.model.Comment;
 import core.basesyntax.model.User;
 import java.util.List;
+import org.hibernate.Session;
 import org.hibernate.SessionFactory;
+import org.hibernate.Transaction;
 
 public class UserDaoImpl extends AbstractDao implements UserDao {
     public UserDaoImpl(SessionFactory sessionFactory) {
@@ -12,21 +15,70 @@ public UserDaoImpl(SessionFactory sessionFactory) {
 
     @Override
     public User create(User entity) {
-        return null;
+        Session session = factory.openSession();
+        Transaction transaction = null;
+        try {
+            transaction = session.beginTransaction();
+            if (entity.getComments() != null) {
+                for (Comment comment : entity.getComments()) {
+                    session.save(comment);
+                }
+            }
+            session.save(entity);
+            transaction.commit();
+            return entity;
+        } catch (Exception e) {
+            if (transaction != null) {
+                transaction.rollback();
+            }
+            throw new RuntimeException("Can't insert user entity", e);
+        } finally {
+            session.close();
+        }
     }
 
     @Override
     public User get(Long id) {
-        return null;
+        Session session = factory.openSession();
+        try {
+            return session.get(User.class, id);
+        } catch (Exception e) {
+            throw new RuntimeException("Can't get smail by id " + id, e);
+        } finally {
+            session.close();
+        }
     }
 
     @Override
     public List<User> getAll() {
-        return null;
+        Session session = factory.openSession();
+        try {
+            return session.createQuery("FROM User", User.class).getResultList();
+        } catch (Exception e) {
+            throw new RuntimeException("Can't get list of comments", e);
+        } finally {
+            session.close();
+        }
     }
 
     @Override
     public void remove(User entity) {
-
+        Session session = factory.openSession();
+        Transaction transaction = null;
+        try {
+            transaction = session.beginTransaction();
+            User user = session.get(User.class, entity.getId());
+            if (user != null) {
+                session.remove(user);
+            }
+            transaction.commit();
+        } catch (Exception e) {
+            if (transaction != null) {
+                transaction.rollback();
+            }
+            throw new RuntimeException("Can't delete comment entity", e);
+        } finally {
+            session.close();
+        }
     }
 }

src/main/java/core/basesyntax/model/Comment.java

@@ -1,16 +1,23 @@
 package core.basesyntax.model;
 
+import jakarta.persistence.CascadeType;
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
 import jakarta.persistence.GeneratedValue;
 import jakarta.persistence.GenerationType;
 import jakarta.persistence.Id;
+import jakarta.persistence.OneToMany;
+import java.util.ArrayList;
 import java.util.List;
 
+@Entity
 public class Comment {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
     private String content;
-    private List<Smile> smiles;
+    @OneToMany(cascade = {CascadeType.PERSIST, CascadeType.MERGE}, fetch = FetchType.EAGER)
+    private List<Smile> smiles = new ArrayList<>();
 
     public Long getId() {
         return id;

src/main/java/core/basesyntax/model/Message.java

@@ -1,8 +1,22 @@
 package core.basesyntax.model;
 
+import jakarta.persistence.CascadeType;
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.OneToOne;
+
+@Entity
 public class Message {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
     private String content;
+    @OneToOne(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
+    @JoinColumn(name = "message_details_id")
     private MessageDetails messageDetails;
 
     public Long getId() {