diff --git a/README.md b/README.md
index 3b5421c..0d33003 100644
--- a/README.md
+++ b/README.md
@@ -1 +1 @@
-**[Отчёт](https://git.is.ulstu.ru/olshab/PIbd-22_Shabunov_O.A._InternetProgramming_Backend/src/branch/Lab2/%D0%9E%D1%82%D1%87%D1%91%D1%82%20%28%D0%BB%D0%B0%D0%B1%D0%BE%D1%80%D0%B0%D1%82%D0%BE%D1%80%D0%BD%D0%B0%D1%8F%20%D1%80%D0%B0%D0%B1%D0%BE%D1%82%D0%B0%20%E2%84%962%29.docx)**
\ No newline at end of file
+**[Отчёт](https://git.is.ulstu.ru/olshab/PIbd-22_Shabunov_O.A._InternetProgramming_Backend/src/branch/Lab3/%D0%9E%D1%82%D1%87%D1%91%D1%82%20%28%D0%BB%D0%B0%D0%B1%D0%BE%D1%80%D0%B0%D1%82%D0%BE%D1%80%D0%BD%D0%B0%D1%8F%20%D1%80%D0%B0%D0%B1%D0%BE%D1%82%D0%B0%20%E2%84%962%29.docx)**
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index b7867b9..42a3cac 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,12 +1,23 @@
 plugins {
 	id 'java'
-	id 'org.springframework.boot' version '3.2.3'
+	id 'org.springframework.boot' version '3.2.5'
 	id 'io.spring.dependency-management' version '1.1.4'
 }
 
 group = 'com.example'
 version = '0.0.1-SNAPSHOT'
 
+defaultTasks 'bootRun'
+
+jar {
+    enabled = false
+}
+
+bootJar {
+    archiveFileName = String.format('%s-%s.jar', rootProject.name, version)
+}
+
+assert System.properties['java.specification.version'] == '17' || '21'
 java {
 	sourceCompatibility = '17'
 }
@@ -17,9 +28,13 @@ repositories {
 
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-web'
+	implementation 'org.springframework.boot:spring-boot-starter-validation'
 	implementation 'org.springdoc:springdoc-openapi-starter-webmvc-ui:2.3.0'
 	implementation 'org.modelmapper:modelmapper:3.2.0'
 
+	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+	implementation 'com.h2database:h2:2.2.224'
+
 	testImplementation 'org.springframework.boot:spring-boot-starter-test'
 }
 
diff --git a/src/main/java/com/example/demo/ageRatings/model/AgeRatingEntity.java b/src/main/java/com/example/demo/ageRatings/model/AgeRatingEntity.java
index 8defbe8..db239e6 100644
--- a/src/main/java/com/example/demo/ageRatings/model/AgeRatingEntity.java
+++ b/src/main/java/com/example/demo/ageRatings/model/AgeRatingEntity.java
@@ -4,15 +4,20 @@ import java.util.Objects;
 
 import com.example.demo.core.model.BaseEntity;
 
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Table;
+
+@Entity
+@Table(name = "ageRatings")
 public class AgeRatingEntity extends BaseEntity {
+    @Column(nullable = false, unique = true, length = 20)
     private String name;
 
     public AgeRatingEntity() {
-        super();
     }
 
-    public AgeRatingEntity(Long id, String name) {
-        super(id);
+    public AgeRatingEntity(String name) {
         this.name = name;
     }
 
@@ -33,11 +38,11 @@ public class AgeRatingEntity extends BaseEntity {
     public boolean equals(Object obj) {
         if (this == obj)
             return true;
+
         if (obj == null || getClass() != obj.getClass())
             return false;
-        final AgeRatingEntity other = (AgeRatingEntity) obj;
-        return Objects.equals(other.getId(), id)
-                && Objects.equals(other.getName(), name);
-    }
 
+        final AgeRatingEntity other = (AgeRatingEntity) obj;
+        return Objects.equals(other.getId(), id) && Objects.equals(other.getName(), name);
+    }
 }
diff --git a/src/main/java/com/example/demo/ageRatings/repository/AgeRatingRepository.java b/src/main/java/com/example/demo/ageRatings/repository/AgeRatingRepository.java
index a781772..a63e73d 100644
--- a/src/main/java/com/example/demo/ageRatings/repository/AgeRatingRepository.java
+++ b/src/main/java/com/example/demo/ageRatings/repository/AgeRatingRepository.java
@@ -1,10 +1,10 @@
 package com.example.demo.ageRatings.repository;
 
-import org.springframework.stereotype.Repository;
+import java.util.Optional;
+import org.springframework.data.repository.CrudRepository;
 
-import com.example.demo.core.repository.MapRepository;
 import com.example.demo.ageRatings.model.AgeRatingEntity;
 
-@Repository
-public class AgeRatingRepository extends MapRepository<AgeRatingEntity> {
+public interface AgeRatingRepository extends CrudRepository<AgeRatingEntity, Long> {
+    Optional<AgeRatingEntity> findByNameIgnoreCase(String name);
 }
diff --git a/src/main/java/com/example/demo/ageRatings/service/AgeRatingService.java b/src/main/java/com/example/demo/ageRatings/service/AgeRatingService.java
index afd262e..9f36ae2 100644
--- a/src/main/java/com/example/demo/ageRatings/service/AgeRatingService.java
+++ b/src/main/java/com/example/demo/ageRatings/service/AgeRatingService.java
@@ -1,9 +1,10 @@
 package com.example.demo.ageRatings.service;
 
 import java.util.List;
-import java.util.Optional;
+import java.util.stream.StreamSupport;
 
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
 import com.example.demo.ageRatings.model.AgeRatingEntity;
 import com.example.demo.ageRatings.repository.AgeRatingRepository;
@@ -17,28 +18,40 @@ public class AgeRatingService {
         this.repository = repository;
     }
 
+    @Transactional(readOnly = true)
     public List<AgeRatingEntity> getAll() {
-        return repository.getAll();
+        return StreamSupport.stream(repository.findAll().spliterator(), false).toList();
     }
 
+    @Transactional(readOnly = true)
     public AgeRatingEntity get(Long id) {
-        return Optional.ofNullable(repository.get(id))
-                .orElseThrow(() -> new NotFoundException(id));
+        return repository.findById(id)
+                .orElseThrow(() -> new NotFoundException(AgeRatingEntity.class, id));
     }
 
+    @Transactional
     public AgeRatingEntity create(AgeRatingEntity entity) {
-        return repository.create(entity);
+        if (entity == null) {
+            throw new IllegalArgumentException("Entity is null");
+        }
+
+        return repository.save(entity);
     }
 
+    @Transactional
     public AgeRatingEntity update(Long id, AgeRatingEntity entity) {
         final AgeRatingEntity existsEntity = get(id);
+
         existsEntity.setName(entity.getName());
-        return repository.update(existsEntity);
+        return repository.save(existsEntity);
     }
 
+    @Transactional
     public AgeRatingEntity delete(Long id) {
         final AgeRatingEntity existsEntity = get(id);
-        return repository.delete(existsEntity);
+        repository.delete(existsEntity);
+
+        return existsEntity;
     }
 
     public void deleteAll() {
diff --git a/src/main/java/com/example/demo/core/configuration/Constants.java b/src/main/java/com/example/demo/core/configuration/Constants.java
index d9c6b7c..ec97a88 100644
--- a/src/main/java/com/example/demo/core/configuration/Constants.java
+++ b/src/main/java/com/example/demo/core/configuration/Constants.java
@@ -1,6 +1,7 @@
 package com.example.demo.core.configuration;
 
 public class Constants {
+    public static final String SEQUENCE_NAME = "hibernate_sequence";
     public static final String API_URL = "/api/1.0";
 
     private Constants() {
diff --git a/src/main/java/com/example/demo/core/error/NotFoundException.java b/src/main/java/com/example/demo/core/error/NotFoundException.java
index 586af3c..0787cb2 100644
--- a/src/main/java/com/example/demo/core/error/NotFoundException.java
+++ b/src/main/java/com/example/demo/core/error/NotFoundException.java
@@ -1,7 +1,7 @@
 package com.example.demo.core.error;
 
 public class NotFoundException extends RuntimeException {
-    public NotFoundException(Long id) {
-        super(String.format("Entity with id [%s] is not found or not exists", id));
+    public <T> NotFoundException(Class<T> inClass, Long id) {
+        super(String.format("%s with id [%s] is not found or not exists", inClass.getSimpleName(), id));
     }
 }
diff --git a/src/main/java/com/example/demo/core/model/BaseEntity.java b/src/main/java/com/example/demo/core/model/BaseEntity.java
index 674ddfb..eba74ad 100644
--- a/src/main/java/com/example/demo/core/model/BaseEntity.java
+++ b/src/main/java/com/example/demo/core/model/BaseEntity.java
@@ -1,15 +1,23 @@
 package com.example.demo.core.model;
 
+import com.example.demo.core.configuration.Constants;
+
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.MappedSuperclass;
+import jakarta.persistence.SequenceGenerator;
+
+@MappedSuperclass
 public abstract class BaseEntity {
+    @Id
+    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = Constants.SEQUENCE_NAME)
+    @SequenceGenerator(name = Constants.SEQUENCE_NAME, sequenceName = Constants.SEQUENCE_NAME, allocationSize = 1)
     protected Long id;
 
     protected BaseEntity() {
     }
 
-    protected BaseEntity(Long id) {
-        this.id = id;
-    }
-
     public Long getId() {
         return id;
     }
diff --git a/src/main/java/com/example/demo/core/repository/CommonRepository.java b/src/main/java/com/example/demo/core/repository/CommonRepository.java
deleted file mode 100644
index 85e1e6d..0000000
--- a/src/main/java/com/example/demo/core/repository/CommonRepository.java
+++ /dev/null
@@ -1,17 +0,0 @@
-package com.example.demo.core.repository;
-
-import java.util.List;
-
-public interface CommonRepository<E, T> {
-    List<E> getAll();
-
-    E get(T id);
-
-    E create(E entity);
-
-    E update(E entity);
-
-    E delete(E entity);
-
-    void deleteAll();
-}
diff --git a/src/main/java/com/example/demo/core/repository/MapRepository.java b/src/main/java/com/example/demo/core/repository/MapRepository.java
deleted file mode 100644
index 6809ac2..0000000
--- a/src/main/java/com/example/demo/core/repository/MapRepository.java
+++ /dev/null
@@ -1,57 +0,0 @@
-package com.example.demo.core.repository;
-
-import java.util.List;
-import java.util.Map;
-import java.util.TreeMap;
-
-import com.example.demo.core.model.BaseEntity;
-
-public abstract class MapRepository<E extends BaseEntity> implements CommonRepository<E, Long> {
-    private final Map<Long, E> entities = new TreeMap<>();
-    private Long lastId = 0L;
-
-    protected MapRepository() {
-    }
-
-    @Override
-    public List<E> getAll() {
-        return entities.values().stream().toList();
-    }
-
-    @Override
-    public E get(Long id) {
-        return entities.get(id);
-    }
-
-    @Override
-    public E create(E entity) {
-        lastId++;
-        entity.setId(lastId);
-        entities.put(lastId, entity);
-        return entity;
-    }
-
-    @Override
-    public E update(E entity) {
-        if (get(entity.getId()) == null) {
-            return null;
-        }
-        entities.put(entity.getId(), entity);
-        return entity;
-    }
-
-    @Override
-    public E delete(E entity) {
-        if (get(entity.getId()) == null) {
-            return null;
-        }
-        entities.remove(entity.getId());
-        return entity;
-    }
-
-    @Override
-    public void deleteAll() {
-        lastId = 0L;
-        entities.clear();
-    }
-}
diff --git a/src/main/java/com/example/demo/movies/model/MovieEntity.java b/src/main/java/com/example/demo/movies/model/MovieEntity.java
index 0f41d5b..0765e32 100644
--- a/src/main/java/com/example/demo/movies/model/MovieEntity.java
+++ b/src/main/java/com/example/demo/movies/model/MovieEntity.java
@@ -4,30 +4,59 @@ import java.util.Objects;
 
 import com.example.demo.core.model.BaseEntity;
 import com.example.demo.types.model.TypeEntity;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.JoinTable;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+
 import com.example.demo.ageRatings.model.AgeRatingEntity;
 
+@Entity
+@Table(name = "movies")
 public class MovieEntity extends BaseEntity {
+    @Column(nullable = false, unique = true, length = 30)
     private String title;
+
+    @ManyToOne
+    @JoinColumn(name = "typeId", nullable = false)
     private TypeEntity type;
-    private boolean requiresSubscription;
-    private String poster;
-    private String description;
-    private Integer releaseDate;
-    private String country;
-    private String tagline;
-    private String director;
+
+    @ManyToOne
+    @JoinColumn(name = "ageRatingId", nullable = false)
     private AgeRatingEntity ageRating;
+
+    @Column(nullable = false)
+    private boolean requiresSubscription;
+
+    @Column(length = 50)
+    private String poster;
+
+    @Column(nullable = false, unique = true, length = 100)
+    private String description;
+
+    private Integer releaseDate;
+
+    @Column(nullable = false, unique = true, length = 20)
+    private String country;
+
+    @Column(nullable = false, unique = true, length = 30)
+    private String tagline;
+
+    @Column(nullable = false, unique = true, length = 30)
+    private String director;
+
+    @Column(nullable = false, unique = true, length = 100)
     private String video;
 
     public MovieEntity() {
-        super();
     }
 
     public MovieEntity(Long id, String title, TypeEntity type, boolean requiresSubscription, String poster,
             String description, Integer releaseDate, String country, String tagline, String director,
             AgeRatingEntity ageRating, String video) {
-        super(id);
-
         this.title = title;
         this.type = type;
         this.requiresSubscription = requiresSubscription;
diff --git a/src/main/java/com/example/demo/types/model/TypeEntity.java b/src/main/java/com/example/demo/types/model/TypeEntity.java
index fd90bdb..4af5c92 100644
--- a/src/main/java/com/example/demo/types/model/TypeEntity.java
+++ b/src/main/java/com/example/demo/types/model/TypeEntity.java
@@ -4,15 +4,20 @@ import java.util.Objects;
 
 import com.example.demo.core.model.BaseEntity;
 
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Table;
+
+@Entity
+@Table(name = "types")
 public class TypeEntity extends BaseEntity {
+    @Column(nullable = false, unique = true, length = 20)
     private String name;
 
     public TypeEntity() {
-        super();
     }
 
-    public TypeEntity(Long id, String name) {
-        super(id);
+    public TypeEntity(String name) {
         this.name = name;
     }
 
@@ -33,11 +38,11 @@ public class TypeEntity extends BaseEntity {
     public boolean equals(Object obj) {
         if (this == obj)
             return true;
+
         if (obj == null || getClass() != obj.getClass())
             return false;
-        final TypeEntity other = (TypeEntity) obj;
-        return Objects.equals(other.getId(), id)
-                && Objects.equals(other.getName(), name);
-    }
 
+        final TypeEntity other = (TypeEntity) obj;
+        return Objects.equals(other.getId(), id) && Objects.equals(other.getName(), name);
+    }
 }
diff --git a/src/main/java/com/example/demo/types/repository/TypeRepository.java b/src/main/java/com/example/demo/types/repository/TypeRepository.java
index 1c29ea2..31a2674 100644
--- a/src/main/java/com/example/demo/types/repository/TypeRepository.java
+++ b/src/main/java/com/example/demo/types/repository/TypeRepository.java
@@ -1,10 +1,10 @@
 package com.example.demo.types.repository;
 
-import org.springframework.stereotype.Repository;
+import java.util.Optional;
+import org.springframework.data.repository.CrudRepository;
 
-import com.example.demo.core.repository.MapRepository;
 import com.example.demo.types.model.TypeEntity;
 
-@Repository
-public class TypeRepository extends MapRepository<TypeEntity> {
+public interface TypeRepository extends CrudRepository<TypeEntity, Long> {
+    Optional<TypeEntity> findByNameIgnoreCase(String name);
 }
diff --git a/src/main/java/com/example/demo/types/service/TypeService.java b/src/main/java/com/example/demo/types/service/TypeService.java
index a594bab..bbfaefc 100644
--- a/src/main/java/com/example/demo/types/service/TypeService.java
+++ b/src/main/java/com/example/demo/types/service/TypeService.java
@@ -1,9 +1,10 @@
 package com.example.demo.types.service;
 
 import java.util.List;
-import java.util.Optional;
+import java.util.stream.StreamSupport;
 
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
 import com.example.demo.core.error.NotFoundException;
 import com.example.demo.types.model.TypeEntity;
@@ -17,28 +18,40 @@ public class TypeService {
         this.repository = repository;
     }
 
+    @Transactional(readOnly = true)
     public List<TypeEntity> getAll() {
-        return repository.getAll();
+        return StreamSupport.stream(repository.findAll().spliterator(), false).toList();
     }
 
+    @Transactional(readOnly = true)
     public TypeEntity get(Long id) {
-        return Optional.ofNullable(repository.get(id))
-                .orElseThrow(() -> new NotFoundException(id));
+        return repository.findById(id)
+                .orElseThrow(() -> new NotFoundException(TypeEntity.class, id));
     }
 
+    @Transactional
     public TypeEntity create(TypeEntity entity) {
-        return repository.create(entity);
+        if (entity == null) {
+            throw new IllegalArgumentException("Entity is null");
+        }
+
+        return repository.save(entity);
     }
 
+    @Transactional
     public TypeEntity update(Long id, TypeEntity entity) {
         final TypeEntity existsEntity = get(id);
+
         existsEntity.setName(entity.getName());
-        return repository.update(existsEntity);
+        return repository.save(existsEntity);
     }
 
+    @Transactional
     public TypeEntity delete(Long id) {
         final TypeEntity existsEntity = get(id);
-        return repository.delete(existsEntity);
+        repository.delete(existsEntity);
+
+        return existsEntity;
     }
 
     public void deleteAll() {
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index 8b13789..b2320c6 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -1 +1,17 @@
+# Server
+spring.main.banner-mode=off
+server.port=8080
 
+# Logger settings
+logging.level.com.example.demo=DEBUG
+
+# JPA settings
+spring.datasource.url=jdbc:h2:file:./data
+spring.datasource.username=sa
+spring.datasource.password=password
+spring.datasource.driver-class-name=org.h2.Driver
+spring.jpa.hibernate.ddl-auto=create
+spring.jpa.open-in-view=false
+
+# H2 console
+spring.h2.console.enabled=true
diff --git a/src/test/resources/application.properties b/src/test/resources/application.properties
new file mode 100644
index 0000000..d5f355c
--- /dev/null
+++ b/src/test/resources/application.properties
@@ -0,0 +1,14 @@
+# Server
+spring.main.banner-mode=off
+
+# Logger settings
+# Available levels are: TRACE, DEBUG, INFO, WARN, ERROR, FATAL, OFF
+logging.level.com.example.demo=DEBUG
+
+# JPA Settings
+spring.datasource.url=jdbc:h2:mem:testdb
+spring.datasource.username=sa
+spring.datasource.password=password
+spring.datasource.driver-class-name=org.h2.Driver
+spring.jpa.hibernate.ddl-auto=create
+spring.jpa.open-in-view=false
\ No newline at end of file
diff --git a/Отчёт (лабораторная работа №2).docx b/Отчёт (лабораторная работа №3).docx
similarity index 100%
rename from Отчёт (лабораторная работа №2).docx
rename to Отчёт (лабораторная работа №3).docx