diff --git a/src/main/java/org/sadtech/social/core/domain/content/ContentType.java b/src/main/java/org/sadtech/social/core/domain/content/ContentType.java
index 88635a2..4c14165 100644
--- a/src/main/java/org/sadtech/social/core/domain/content/ContentType.java
+++ b/src/main/java/org/sadtech/social/core/domain/content/ContentType.java
@@ -7,6 +7,8 @@ package org.sadtech.social.core.domain.content;
  */
 public enum ContentType {
 
-    MAIL, BOARD_COMMENT, EMPTY
+    MAIL,
+    BOARD_COMMENT,
+    EMPTY
 
 }
diff --git a/src/main/java/org/sadtech/social/core/domain/content/Mail.java b/src/main/java/org/sadtech/social/core/domain/content/Mail.java
index 248a6b3..f0b9a58 100644
--- a/src/main/java/org/sadtech/social/core/domain/content/Mail.java
+++ b/src/main/java/org/sadtech/social/core/domain/content/Mail.java
@@ -5,7 +5,9 @@ import lombok.EqualsAndHashCode;
 import org.sadtech.social.core.domain.content.attachment.Attachment;
 import org.sadtech.social.core.utils.Description;
 
+import javax.persistence.Column;
 import javax.persistence.Entity;
+import javax.persistence.OneToMany;
 import javax.persistence.Table;
 import java.util.List;
 
@@ -20,6 +22,8 @@ import java.util.List;
 @EqualsAndHashCode(callSuper = true)
 public class Mail extends Message {
 
+    @OneToMany
+    @Column(name = "attachment")
     @Description("Вложения к сообщению")
     private List<Attachment> attachments;
 
diff --git a/src/main/java/org/sadtech/social/core/domain/content/Message.java b/src/main/java/org/sadtech/social/core/domain/content/Message.java
index 2b4566a..459eae3 100644
--- a/src/main/java/org/sadtech/social/core/domain/content/Message.java
+++ b/src/main/java/org/sadtech/social/core/domain/content/Message.java
@@ -4,7 +4,10 @@ import com.sun.istack.internal.NotNull;
 import lombok.Data;
 import org.sadtech.social.core.utils.Description;
 
+import javax.persistence.Column;
 import javax.persistence.Entity;
+import javax.persistence.EnumType;
+import javax.persistence.Enumerated;
 import javax.persistence.GeneratedValue;
 import javax.persistence.Id;
 import java.time.LocalDateTime;
@@ -23,17 +26,22 @@ public abstract class Message {
     @Description("Идентификатор сообщения")
     private Integer id;
 
+    @Column(name = "type")
+    @Enumerated(value = EnumType.STRING)
     @Description("Тип сообщения")
     protected ContentType type;
 
     @NotNull
+    @Column(name = "create_date")
     @Description("Дата создания")
     private LocalDateTime createDate;
 
     @NotNull
+    @Column(name = "person_id")
     @Description("Идентификатор пользователя, отправившего сообщение")
     private Integer personId;
 
+    @Column(name = "text")
     @Description("Текстовое сообщение")
     private String text;
 
diff --git a/src/main/java/org/sadtech/social/core/domain/content/attachment/Attachment.java b/src/main/java/org/sadtech/social/core/domain/content/attachment/Attachment.java
index e288600..e2c2666 100644
--- a/src/main/java/org/sadtech/social/core/domain/content/attachment/Attachment.java
+++ b/src/main/java/org/sadtech/social/core/domain/content/attachment/Attachment.java
@@ -3,14 +3,28 @@ package org.sadtech.social.core.domain.content.attachment;
 import lombok.EqualsAndHashCode;
 import org.sadtech.social.core.utils.Description;
 
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.EnumType;
+import javax.persistence.Enumerated;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+
 /**
  * Абстрактная сущность, для всех вложений к сообщениям от пользователей.
  *
  * @author upagge [08/07/2019]
  */
+@Entity
 @EqualsAndHashCode
 public abstract class Attachment {
 
+    @Id
+    @GeneratedValue
+    private Integer id;
+
+    @Column(name = "type")
+    @Enumerated(value = EnumType.STRING)
     @Description("Тип сущности")
     protected AttachmentType type;