Adding serialVersionUID to fix eclipse warning

polling-app-server/src/main/java/com/example/polls/exception/AppException.java

@@ -5,7 +5,9 @@
 
 @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
 public class AppException extends RuntimeException {
-    public AppException(String message) {
+    private static final long serialVersionUID = 7701205683797441915L;
+
+	public AppException(String message) {
         super(message);
     }
 

polling-app-server/src/main/java/com/example/polls/exception/BadRequestException.java

@@ -6,7 +6,9 @@
 @ResponseStatus(HttpStatus.BAD_REQUEST)
 public class BadRequestException extends RuntimeException {
 
-    public BadRequestException(String message) {
+    private static final long serialVersionUID = 8080239336966682711L;
+
+	public BadRequestException(String message) {
         super(message);
     }
 

polling-app-server/src/main/java/com/example/polls/exception/ResourceNotFoundException.java

@@ -5,7 +5,8 @@
 
 @ResponseStatus(HttpStatus.NOT_FOUND)
 public class ResourceNotFoundException extends RuntimeException {
-    private String resourceName;
+    private static final long serialVersionUID = -3670306963854166388L;
+	private String resourceName;
     private String fieldName;
     private Object fieldValue;
 

polling-app-server/src/main/java/com/example/polls/model/Poll.java

@@ -15,7 +15,9 @@
 @Entity
 @Table(name = "polls")
 public class Poll extends UserDateAudit {
-    @Id
+    private static final long serialVersionUID = -8416404242020324624L;
+
+	@Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
 

polling-app-server/src/main/java/com/example/polls/model/User.java

@@ -19,7 +19,9 @@
         })
 })
 public class User extends DateAudit {
-    @Id
+    private static final long serialVersionUID = -7054738240930572707L;
+
+	@Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
 

polling-app-server/src/main/java/com/example/polls/model/Vote.java

@@ -11,7 +11,9 @@
         })
 })
 public class Vote extends DateAudit {
-    @Id
+    private static final long serialVersionUID = -5578989888687444296L;
+
+	@Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
 

polling-app-server/src/main/java/com/example/polls/model/audit/DateAudit.java

@@ -18,7 +18,9 @@
 )
 public abstract class DateAudit implements Serializable {
 
-    @CreatedDate
+    private static final long serialVersionUID = 2393672420511675415L;
+
+	@CreatedDate
     private Instant createdAt;
 
     @LastModifiedDate

polling-app-server/src/main/java/com/example/polls/model/audit/UserDateAudit.java

@@ -15,7 +15,9 @@
 )
 public abstract class UserDateAudit extends DateAudit {
 
-    @CreatedBy
+    private static final long serialVersionUID = -5668994881302355970L;
+
+	@CreatedBy
     private Long createdBy;
 
     @LastModifiedBy

polling-app-server/src/main/java/com/example/polls/security/UserPrincipal.java

@@ -12,7 +12,9 @@
 import java.util.stream.Collectors;
 
 public class UserPrincipal implements UserDetails {
-    private Long id;
+    private static final long serialVersionUID = -394792056682796726L;
+
+	private Long id;
 
     private String name;