optimize code, add interfaces

src/main/java/com/faf223/expensetrackerfaf/model/Expense.java

@@ -1,10 +1,7 @@
 package com.faf223.expensetrackerfaf.model;
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import jakarta.persistence.*;
-import lombok.AllArgsConstructor;
-import lombok.Data;
-import lombok.ToString;
-import lombok.NoArgsConstructor;
+import lombok.*;
 
 import java.math.BigDecimal;
 import java.time.LocalDate;
@@ -16,6 +13,7 @@ import java.time.LocalDate;
 public class Expense implements IMoneyTransaction {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Getter(AccessLevel.NONE)
     private Long expenseId;
 
     @ManyToOne()
@@ -30,5 +28,11 @@ public class Expense implements IMoneyTransaction {
 
     private LocalDate date;
     private BigDecimal amount;
+
+    @Override
+    public Long getId() {
+        return expenseId;
+    }
+
 }