create class for each entity

src/main/java/com/wellsfargo/counselor/entity/Client.java

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+package com.wellsfargo.counselor.entity;
+
+import jakarta.persistence.*;
+
+import java.util.List;
+
+@Entity
+public class Client {
+    @Id
+    @GeneratedValue
+    private long client_id;
+
+    @Column(nullable = false)
+    private String firstName;
+
+    @Column(nullable = false)
+    private String lastName;
+
+    @Column(nullable = false)
+    private String email;
+
+    @Column(nullable = false)
+    private String phone;
+
+    @Column(nullable = false)
+    private String address;
+
+    @ManyToOne
+    @JoinColumn(name = "advisorId")
+    private Advisor advisor;
+
+    @OneToMany(mappedBy = "client")
+    private List<Portifolio> portifolios;
+
+    public Client() {
+    }
+
+    public Client(String firstName, String lastName, String email, String phone, String address, Advisor advisor) {
+        this.firstName = firstName;
+        this.lastName = lastName;
+        this.email = email;
+        this.phone = phone;
+        this.address = address;
+        this.advisor = advisor;
+    }
+
+    public long getClient_id() {
+        return client_id;
+    }
+
+    public void setClient_id(long client_id) {
+        this.client_id = client_id;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public String getPhone() {
+        return phone;
+    }
+
+    public void setPhone(String phone) {
+        this.phone = phone;
+    }
+
+    public String getAddress() {
+        return address;
+    }
+
+    public void setAddress(String address) {
+        this.address = address;
+    }
+
+    public Advisor getAdvisor() {
+        return advisor;
+    }
+
+    public void setAdvisor(Advisor advisor) {
+        this.advisor = advisor;
+    }
+}

src/main/java/com/wellsfargo/counselor/entity/Portifolio.java

@@ -0,0 +1,63 @@
+package com.wellsfargo.counselor.entity;
+
+import jakarta.persistence.*;
+
+import java.util.Date;
+import java.util.List;
+
+@Entity
+public class Portifolio {
+    @Id
+    @GeneratedValue
+    private Long portifolio_id;
+
+    @Column(nullable = false)
+    private Date creationDate;
+
+    @ManyToOne
+    @JoinColumn(name = "client_id")
+    private Client client;
+
+    @OneToMany(mappedBy = "portifolio")
+    private List<Security> securities;
+
+    public Portifolio() {
+    }
+
+    public Portifolio(Client client, Date creationDate) {
+        this.client = client;
+        this.creationDate = creationDate;
+    }
+
+    public Long getPortifolio_id() {
+        return portifolio_id;
+    }
+
+    public void setPortifolio_id(Long portifolio_id) {
+        this.portifolio_id = portifolio_id;
+    }
+
+    public Date getCreationDate() {
+        return creationDate;
+    }
+
+    public void setCreationDate(Date creationDate) {
+        this.creationDate = creationDate;
+    }
+
+    public Client getClient() {
+        return client;
+    }
+
+    public void setClient(Client client) {
+        this.client = client;
+    }
+
+    public List<Security> getSecurities() {
+        return securities;
+    }
+
+    public void setSecurities(List<Security> securities) {
+        this.securities = securities;
+    }
+}

src/main/java/com/wellsfargo/counselor/entity/Security.java

@@ -0,0 +1,100 @@
+package com.wellsfargo.counselor.entity;
+
+import jakarta.persistence.*;
+
+import java.math.BigDecimal;
+import java.util.Date;
+
+@Entity
+public class Security {
+    @Id
+    @GeneratedValue
+    private Long security_id;
+
+    @Column(nullable = false)
+    private String name;
+
+    @Column(nullable = false)
+    private String category;
+
+    @Column(nullable = false)
+    private Date purchaseDate;
+
+    @Column(nullable = false)
+    private BigDecimal purchasePrice;
+
+    @Column(nullable = false)
+    private int quantity;
+
+    @ManyToOne
+    @JoinColumn(name = "portifolio_id")
+    private Portifolio portifolio;
+
+    public Security() {
+    }
+
+    public Security(Portifolio portifolio, String name, String category, Date purchaseDate, BigDecimal purchasePrice, int quantity) {
+        this.name = name;
+        this.category = category;
+        this.purchaseDate = purchaseDate;
+        this.purchasePrice = purchasePrice;
+        this.quantity = quantity;
+        this.portifolio = portifolio;
+    }
+
+    public Long getSecurity_id() {
+        return security_id;
+    }
+
+    public void setSecurity_id(Long security_id) {
+        this.security_id = security_id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getCategory() {
+        return category;
+    }
+
+    public void setCategory(String category) {
+        this.category = category;
+    }
+
+    public Date getPurchaseDate() {
+        return purchaseDate;
+    }
+
+    public void setPurchaseDate(Date purchaseDate) {
+        this.purchaseDate = purchaseDate;
+    }
+
+    public BigDecimal getPurchasePrice() {
+        return purchasePrice;
+    }
+
+    public void setPurchasePrice(BigDecimal purchasePrice) {
+        this.purchasePrice = purchasePrice;
+    }
+
+    public int getQuantity() {
+        return quantity;
+    }
+
+    public void setQuantity(int quantity) {
+        this.quantity = quantity;
+    }
+
+    public Portifolio getPortifolio() {
+        return portifolio;
+    }
+
+    public void setPortifolio(Portifolio portifolio) {
+        this.portifolio = portifolio;
+    }
+}