diff --git a/src/main/java/core/basesyntax/dao/impl/CommentDaoImpl.java b/src/main/java/core/basesyntax/dao/impl/CommentDaoImpl.java
index 5176c951f..3d743f8a9 100644
--- a/src/main/java/core/basesyntax/dao/impl/CommentDaoImpl.java
+++ b/src/main/java/core/basesyntax/dao/impl/CommentDaoImpl.java
@@ -2,8 +2,12 @@
 
 import core.basesyntax.dao.CommentDao;
 import core.basesyntax.model.Comment;
+import jakarta.persistence.criteria.CriteriaBuilder;
+import jakarta.persistence.criteria.CriteriaQuery;
 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 +16,73 @@ public CommentDaoImpl(SessionFactory sessionFactory) {
 
     @Override
     public Comment create(Comment entity) {
-        return null;
+        Session session = null;
+        Transaction transaction = null;
+        try {
+            session = factory.openSession();
+            transaction = session.beginTransaction();
+            session.persist(entity);
+            transaction.commit();
+        } catch (Exception ex) {
+            if (transaction != null) {
+                transaction.rollback();
+            }
+            throw new RuntimeException("Can't create entity: " + entity);
+        } finally {
+            if (session != null) {
+                session.close();
+            }
+        }
+        return entity;
     }
 
     @Override
     public Comment get(Long id) {
-        return null;
+        try (Session session = factory.openSession()) {
+            return session.get(Comment.class, id);
+        } catch (Exception ex) {
+            throw new RuntimeException("Can't get comment with id: " + id);
+        }
     }
 
     @Override
     public List<Comment> getAll() {
-        return null;
+        Session session = null;
+        List<Comment> commentList = null;
+        try {
+            session = factory.openSession();
+            CriteriaBuilder criteriaBuilder = session.getCriteriaBuilder();
+            CriteriaQuery<Comment> criteriaQuery = criteriaBuilder.createQuery(Comment.class);
+            criteriaQuery.from(Comment.class);
+            commentList = session.createQuery(criteriaQuery).getResultList();
+        } catch (Exception ex) {
+            throw new RuntimeException("Can't get all comments from DB");
+        } finally {
+            if (session != null) {
+                session.close();
+            }
+        }
+        return commentList;
     }
 
     @Override
     public void remove(Comment entity) {
-
+        Session session = null;
+        Transaction transaction = null;
+        try {
+            session = factory.openSession();
+            transaction = session.beginTransaction();
+            session.remove(entity);
+            transaction.commit();
+        } catch (Exception ex) {
+            if (transaction != null) {
+                transaction.rollback();
+            }
+            throw new RuntimeException("Can't remove entity: " + entity);
+        } finally {
+            if (session != null) {
+                session.close();
+            }
+        }
     }
 }
diff --git a/src/main/java/core/basesyntax/dao/impl/MessageDaoImpl.java b/src/main/java/core/basesyntax/dao/impl/MessageDaoImpl.java
index 9b899fa95..d68437eff 100644
--- a/src/main/java/core/basesyntax/dao/impl/MessageDaoImpl.java
+++ b/src/main/java/core/basesyntax/dao/impl/MessageDaoImpl.java
@@ -2,8 +2,12 @@
 
 import core.basesyntax.dao.MessageDao;
 import core.basesyntax.model.Message;
+import jakarta.persistence.criteria.CriteriaBuilder;
+import jakarta.persistence.criteria.CriteriaQuery;
 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 +16,74 @@ public MessageDaoImpl(SessionFactory sessionFactory) {
 
     @Override
     public Message create(Message entity) {
-        return null;
+        Session session = null;
+        Transaction transaction = null;
+        try {
+            session = factory.openSession();
+            transaction = session.beginTransaction();
+            session.persist(entity);
+            transaction.commit();
+        } catch (Exception ex) {
+            if (transaction != null) {
+                transaction.rollback();
+            }
+            throw new RuntimeException("Can't create message: " + entity);
+        } finally {
+            if (session != null) {
+                session.close();
+            }
+        }
+        return entity;
     }
 
     @Override
     public Message get(Long id) {
-        return null;
+        try (Session session = factory.openSession()) {
+            return session.get(Message.class, id);
+        } catch (Exception ex) {
+            throw new RuntimeException("Can't get message with id: " + id);
+        }
     }
 
     @Override
     public List<Message> getAll() {
-        return null;
+        List<Message> messagesList = null;
+        Session session = null;
+        try {
+            session = factory.openSession();
+            CriteriaBuilder criteriaBuilder = session.getCriteriaBuilder();
+            CriteriaQuery<Message> messageCriteriaQuery =
+                    criteriaBuilder.createQuery(Message.class);
+            messageCriteriaQuery.from(Message.class);
+            messagesList = session.createQuery(messageCriteriaQuery).getResultList();
+        } catch (Exception ex) {
+            throw new RuntimeException("Can't get all messages from DB");
+        } finally {
+            if (session != null) {
+                session.close();
+            }
+        }
+        return messagesList;
     }
 
     @Override
     public void remove(Message entity) {
-
+        Session session = null;
+        Transaction transaction = null;
+        try {
+            session = factory.openSession();
+            transaction = session.beginTransaction();
+            session.remove(entity);
+            transaction.commit();
+        } catch (Exception ex) {
+            if (transaction != null) {
+                transaction.rollback();
+            }
+            throw new RuntimeException("Can't remove entity: " + entity);
+        } finally {
+            if (session != null) {
+                session.close();
+            }
+        }
     }
 }
diff --git a/src/main/java/core/basesyntax/dao/impl/MessageDetailsDaoImpl.java b/src/main/java/core/basesyntax/dao/impl/MessageDetailsDaoImpl.java
index fb96d35aa..bdd454c2c 100644
--- a/src/main/java/core/basesyntax/dao/impl/MessageDetailsDaoImpl.java
+++ b/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 = null;
+        Transaction transaction = null;
+        try {
+            session = factory.openSession();
+            transaction = session.beginTransaction();
+            session.persist(entity);
+            transaction.commit();
+        } catch (Exception ex) {
+            if (transaction != null) {
+                transaction.rollback();
+            }
+            throw new RuntimeException("Can't create message details entity: " + entity);
+        } finally {
+            if (session != null) {
+                session.close();
+            }
+        }
+        return entity;
     }
 
     @Override
     public MessageDetails get(Long id) {
-        return null;
+        try (Session session = factory.openSession()) {
+            return session.get(MessageDetails.class, id);
+        } catch (Exception ex) {
+            throw new RuntimeException("Can't get smile with id: " + id);
+        }
     }
 }
diff --git a/src/main/java/core/basesyntax/dao/impl/SmileDaoImpl.java b/src/main/java/core/basesyntax/dao/impl/SmileDaoImpl.java
index 559248cda..af02dd2cd 100644
--- a/src/main/java/core/basesyntax/dao/impl/SmileDaoImpl.java
+++ b/src/main/java/core/basesyntax/dao/impl/SmileDaoImpl.java
@@ -2,8 +2,12 @@
 
 import core.basesyntax.dao.SmileDao;
 import core.basesyntax.model.Smile;
+import jakarta.persistence.criteria.CriteriaBuilder;
+import jakarta.persistence.criteria.CriteriaQuery;
 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 +16,52 @@ public SmileDaoImpl(SessionFactory sessionFactory) {
 
     @Override
     public Smile create(Smile entity) {
-        return null;
+        Session session = null;
+        Transaction transaction = null;
+        try {
+            session = factory.openSession();
+            transaction = session.beginTransaction();
+            session.persist(entity);
+            transaction.commit();
+        } catch (Exception ex) {
+            if (transaction != null) {
+                transaction.rollback();
+            }
+            throw new RuntimeException("Can't create smile: " + entity);
+        } finally {
+            if (session != null) {
+                session.close();
+            }
+        }
+        return entity;
     }
 
     @Override
     public Smile get(Long id) {
-        return null;
+        try (Session session = factory.openSession()) {
+            return session.get(Smile.class, id);
+        } catch (Exception ex) {
+            throw new RuntimeException("Can't get smile with id: " + id);
+        }
     }
 
     @Override
     public List<Smile> getAll() {
-        return null;
+        List<Smile> smileList = null;
+        Session session = null;
+        try {
+            session = factory.openSession();
+            CriteriaBuilder criteriaBuilder = session.getCriteriaBuilder();
+            CriteriaQuery<Smile> smileCriteriaQuery = criteriaBuilder.createQuery(Smile.class);
+            smileCriteriaQuery.from(Smile.class);
+            smileList = session.createQuery(smileCriteriaQuery).getResultList();
+        } catch (Exception ex) {
+            throw new RuntimeException("Can't get all smiles from DB");
+        } finally {
+            if (session != null) {
+                session.close();
+            }
+        }
+        return smileList;
     }
 }
diff --git a/src/main/java/core/basesyntax/dao/impl/UserDaoImpl.java b/src/main/java/core/basesyntax/dao/impl/UserDaoImpl.java
index 338d8248b..ce459a2aa 100644
--- a/src/main/java/core/basesyntax/dao/impl/UserDaoImpl.java
+++ b/src/main/java/core/basesyntax/dao/impl/UserDaoImpl.java
@@ -2,8 +2,12 @@
 
 import core.basesyntax.dao.UserDao;
 import core.basesyntax.model.User;
+import jakarta.persistence.criteria.CriteriaBuilder;
+import jakarta.persistence.criteria.CriteriaQuery;
 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 +16,73 @@ public UserDaoImpl(SessionFactory sessionFactory) {
 
     @Override
     public User create(User entity) {
-        return null;
+        Session session = null;
+        Transaction transaction = null;
+        try {
+            session = factory.openSession();
+            transaction = session.beginTransaction();
+            session.persist(entity);
+            transaction.commit();
+        } catch (Exception ex) {
+            if (transaction != null) {
+                transaction.rollback();
+            }
+            throw new RuntimeException("Can't create user: " + entity);
+        } finally {
+            if (session != null) {
+                session.close();
+            }
+        }
+        return entity;
     }
 
     @Override
     public User get(Long id) {
-        return null;
+        try (Session session = factory.openSession()) {
+            return session.get(User.class, id);
+        } catch (Exception ex) {
+            throw new RuntimeException("Can't get user with id: " + id);
+        }
     }
 
     @Override
     public List<User> getAll() {
-        return null;
+        List<User> userList = null;
+        Session session = null;
+        try {
+            session = factory.openSession();
+            CriteriaBuilder criteriaBuilder = session.getCriteriaBuilder();
+            CriteriaQuery<User> criteriaQuery = criteriaBuilder.createQuery(User.class);
+            criteriaQuery.from(User.class);
+            userList = session.createQuery(criteriaQuery).getResultList();
+        } catch (Exception ex) {
+            throw new RuntimeException("Can't get all users from DB");
+        } finally {
+            if (session != null) {
+                session.close();
+            }
+        }
+        return userList;
     }
 
     @Override
     public void remove(User entity) {
-
+        Session session = null;
+        Transaction transaction = null;
+        try {
+            session = factory.openSession();
+            transaction = session.beginTransaction();
+            session.remove(entity);
+            transaction.commit();
+        } catch (Exception ex) {
+            if (transaction != null) {
+                transaction.rollback();
+            }
+            throw new RuntimeException("Can't remove entity: " + entity);
+        } finally {
+            if (session != null) {
+                session.close();
+            }
+        }
     }
 }
diff --git a/src/main/java/core/basesyntax/model/Comment.java b/src/main/java/core/basesyntax/model/Comment.java
index 9fba0c920..338d6a8d2 100644
--- a/src/main/java/core/basesyntax/model/Comment.java
+++ b/src/main/java/core/basesyntax/model/Comment.java
@@ -1,15 +1,22 @@
 package core.basesyntax.model;
 
+import jakarta.persistence.CascadeType;
+import jakarta.persistence.Entity;
 import jakarta.persistence.GeneratedValue;
 import jakarta.persistence.GenerationType;
 import jakarta.persistence.Id;
+import jakarta.persistence.OneToMany;
+import jakarta.persistence.Table;
 import java.util.List;
 
+@Entity
+@Table(name = "comments")
 public class Comment {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
     private String content;
+    @OneToMany(cascade = {CascadeType.DETACH})
     private List<Smile> smiles;
 
     public Long getId() {
diff --git a/src/main/java/core/basesyntax/model/Message.java b/src/main/java/core/basesyntax/model/Message.java
index 672b5d485..dc17c925b 100644
--- a/src/main/java/core/basesyntax/model/Message.java
+++ b/src/main/java/core/basesyntax/model/Message.java
@@ -1,8 +1,21 @@
 package core.basesyntax.model;
 
+import jakarta.persistence.CascadeType;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.OneToOne;
+import jakarta.persistence.Table;
+
+@Entity
+@Table(name = "message")
 public class Message {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
     private String content;
+    @OneToOne(cascade = {CascadeType.PERSIST, CascadeType.REMOVE})
     private MessageDetails messageDetails;
 
     public Long getId() {
diff --git a/src/main/java/core/basesyntax/model/MessageDetails.java b/src/main/java/core/basesyntax/model/MessageDetails.java
index 185023dd5..11895cbe1 100644
--- a/src/main/java/core/basesyntax/model/MessageDetails.java
+++ b/src/main/java/core/basesyntax/model/MessageDetails.java
@@ -1,8 +1,17 @@
 package core.basesyntax.model;
 
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
 import java.time.LocalDateTime;
 
+@Entity
+@Table(name = "message_details")
 public class MessageDetails {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
     private String sender;
     private LocalDateTime sentTime;
diff --git a/src/main/java/core/basesyntax/model/Smile.java b/src/main/java/core/basesyntax/model/Smile.java
index 4395eb0f7..9218c0f8d 100644
--- a/src/main/java/core/basesyntax/model/Smile.java
+++ b/src/main/java/core/basesyntax/model/Smile.java
@@ -4,8 +4,10 @@
 import jakarta.persistence.GeneratedValue;
 import jakarta.persistence.GenerationType;
 import jakarta.persistence.Id;
+import jakarta.persistence.Table;
 
 @Entity
+@Table(name = "smiles")
 public class Smile {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
diff --git a/src/main/java/core/basesyntax/model/User.java b/src/main/java/core/basesyntax/model/User.java
index 0141eef00..c1dc4d633 100644
--- a/src/main/java/core/basesyntax/model/User.java
+++ b/src/main/java/core/basesyntax/model/User.java
@@ -1,10 +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 jakarta.persistence.Table;
 import java.util.List;
 
+@Entity
+@Table(name = "users")
 public class User {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
     private String username;
+    @OneToMany(fetch = FetchType.EAGER, cascade = CascadeType.PERSIST)
     private List<Comment> comments;
 
     public Long getId() {
diff --git a/src/main/resources/hibernate.cfg.xml b/src/main/resources/hibernate.cfg.xml
index cba4560a4..20cb5c832 100644
--- a/src/main/resources/hibernate.cfg.xml
+++ b/src/main/resources/hibernate.cfg.xml
@@ -5,7 +5,6 @@
 
 <hibernate-configuration>
     <session-factory>
-        <property name="hibernate.dialect">org.hibernate.dialect.MySQL8Dialect</property>
         <property name="connection.url">jdbc:mysql://localhost/cinema?serverTimezone=UTC</property>
         <property name="connection.driver_class">com.mysql.cj.jdbc.Driver</property>
         <property name="connection.username">ma_admin</property>
@@ -13,6 +12,10 @@
         <property name="show_sql">true</property>
         <property name="hbm2ddl.auto">update</property>
 
-
+        <mapping class="core.basesyntax.model.Comment"/>
+        <mapping class="core.basesyntax.model.Message"/>
+        <mapping class="core.basesyntax.model.MessageDetails"/>
+        <mapping class="core.basesyntax.model.Smile"/>
+        <mapping class="core.basesyntax.model.User"/>
     </session-factory>
 </hibernate-configuration>