Add model classes

src/main/java/net/kapcake/bankingservice/domain/AccountStatus.java

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+package net.kapcake.bankingservice.domain;
+
+public enum AccountStatus {
+    ENABLED,
+    BLOCKED
+}

src/main/java/net/kapcake/bankingservice/domain/Address.java

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+package net.kapcake.bankingservice.domain;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import lombok.Data;
+
+@Entity
+@Data
+public class Address {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+    private String street;
+    private Integer number;
+    private String numberExtension;
+    private Integer postalCode;
+    private String country;
+}

src/main/java/net/kapcake/bankingservice/domain/Balance.java

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+package net.kapcake.bankingservice.domain;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import lombok.Data;
+
+@Entity
+@Data
+public class Balance {
+    @Id
+    @GeneratedValue
+    private Long id;
+    private Long amount;
+    private String currency;
+    private BalanceType type;
+}

src/main/java/net/kapcake/bankingservice/domain/BalanceType.java

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+package net.kapcake.bankingservice.domain;
+
+public enum BalanceType {
+    END_OF_DAY,
+    AVAILABLE
+}

src/main/java/net/kapcake/bankingservice/domain/BankAccount.java

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+package net.kapcake.bankingservice.domain;
+
+import jakarta.persistence.*;
+import lombok.Data;
+
+import java.util.List;
+
+@Entity
+@Data
+public class BankAccount {
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    private String accountNumber;
+
+    @ManyToMany
+    private List<User> users;
+    private String accountName;
+    @OneToMany
+    private List<Balance> balances;
+    private AccountStatus status;
+
+}

src/main/java/net/kapcake/bankingservice/domain/Payment.java

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+package net.kapcake.bankingservice.domain;
+
+import jakarta.persistence.*;
+import lombok.Data;
+import org.hibernate.annotations.CreationTimestamp;
+
+import java.util.Date;
+
+@Entity
+@Data
+public class Payment {
+    @Id
+    @GeneratedValue
+    private Long id;
+    private Long amount;
+    private String currency;
+    @ManyToOne
+    private BankAccount giver;
+    private String beneficiaryAccountNumber;
+    private String beneficiaryName;
+    private String communication;
+    @CreationTimestamp
+    @Temporal(TemporalType.TIMESTAMP)
+    private Date creationDate;
+    private PaymentStatus status;
+}

src/main/java/net/kapcake/bankingservice/domain/PaymentStatus.java

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+package net.kapcake.bankingservice.domain;
+
+public enum PaymentStatus {
+    EXECUTED
+}

src/main/java/net/kapcake/bankingservice/domain/User.java

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+package net.kapcake.bankingservice.domain;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+import lombok.Data;
+
+@Entity
+@Data
+public class User {
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    private String username;
+    private String password;
+    @ManyToOne
+    private Address address;
+}