diff --git a/src/main/java/org/springframework/samples/petclinic/owner/Owner.java b/src/main/java/org/springframework/samples/petclinic/owner/Owner.java
index a0e6d3c5b..675b2140e 100644
--- a/src/main/java/org/springframework/samples/petclinic/owner/Owner.java
+++ b/src/main/java/org/springframework/samples/petclinic/owner/Owner.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2012-2019 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package org.springframework.samples.petclinic.owner;
 
 import java.util.ArrayList;
@@ -21,121 +36,140 @@ import jakarta.validation.constraints.NotBlank;
 /**
  * Simple JavaBean domain object representing an owner.
  *
- * (Autores omitidos para mayor claridad)
+ * @author Ken Krebs
+ * @author Juergen Hoeller
+ * @author Sam Brannen
+ * @author Michael Isvy
+ * @author Oliver Drotbohm
+ * @author Wick Dynex
  */
 @Entity
 @Table(name = "owners")
 public class Owner extends Person {
 
-    @Column(name = "address")
-    @NotBlank
-    private String address;
+	@Column(name = "address")
+	@NotBlank
+	private String address;
 
-    @Column(name = "city")
-    @NotBlank
-    private String city;
+	@Column(name = "city")
+	@NotBlank
+	private String city;
 
-    @Column(name = "telephone")
-    @NotBlank
-    @Pattern(regexp = "\\d{10}", message = "Telephone must be a 10-digit number")
-    private String telephone;
+	@Column(name = "telephone")
+	@NotBlank
+	@Pattern(regexp = "\\d{10}", message = "Telephone must be a 10-digit number")
+	private String telephone;
 
-    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
-    @JoinColumn(name = "owner_id")
-    @OrderBy("name")
-    private final List<Pet> pets = new ArrayList<>();
+	@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
+	@JoinColumn(name = "owner_id")
+	@OrderBy("name")
+	private final List<Pet> pets = new ArrayList<>();
 
-    public String getAddress() {
-        return this.address;
-    }
+	public String getAddress() {
+		return this.address;
+	}
 
-    public void setAddress(String address) {
-        this.address = address;
-    }
+	public void setAddress(String address) {
+		this.address = address;
+	}
 
-    public String getCity() {
-        return this.city;
-    }
+	public String getCity() {
+		return this.city;
+	}
 
-    public void setCity(String city) {
-        this.city = city;
-    }
+	public void setCity(String city) {
+		this.city = city;
+	}
 
-    public String getTelephone() {
-        return this.telephone;
-    }
+	public String getTelephone() {
+		return this.telephone;
+	}
 
-    public void setTelephone(String telephone) {
-        this.telephone = telephone;
-    }
+	public void setTelephone(String telephone) {
+		this.telephone = telephone;
+	}
 
-    public List<Pet> getPets() {
-        return this.pets;
-    }
+	public List<Pet> getPets() {
+		return this.pets;
+	}
 
-    public void addPet(Pet pet) {
-        if (pet.isNew()) {
-            getPets().add(pet);
-        }
-    }
+	public void addPet(Pet pet) {
+		if (pet.isNew()) {
+			getPets().add(pet);
+		}
+	}
 
-    /**
-     * Return the Pet with the given name, or null if none found for this Owner.
-     *
-     * @param name to test
-     * @return the Pet with the given name, or null if no such Pet exists for this Owner
-     */
-    public Pet getPet(String name) {
-        return getPet(name, false);
-    }
+	/**
+	 * Return the Pet with the given name, or null if none found for this Owner.
+	 * @param name to test
+	 * @return the Pet with the given name, or null if no such Pet exists for this Owner
+	 */
+	public Pet getPet(String name) {
+		return getPet(name, false);
+	}
 
-    /**
-     * Return the Pet with the given id, or null if none found for this Owner.
-     *
-     * @param id to test
-     * @return the Pet with the given id, or null if no such Pet exists for this Owner
-     */
-    public Pet getPet(Integer id) {
-        for (Pet pet : getPets()) {
-            if (!pet.isNew()) {
-                Integer compId = pet.getId();
-                if (compId.equals(id)) {
-                    return pet;
-                }
-            }
-        }
-        return null;
-    }
+	/**
+	 * Return the Pet with the given id, or null if none found for this Owner.
+	 * @param id to test
+	 * @return the Pet with the given id, or null if no such Pet exists for this Owner
+	 */
+	public Pet getPet(Integer id) {
+		for (Pet pet : getPets()) {
+			if (!pet.isNew()) {
+				Integer compId = pet.getId();
+				if (compId.equals(id)) {
+					return pet;
+				}
+			}
+		}
+		return null;
+	}
 
-    /**
-     * Return the Pet with the given name, or null if none found for this Owner.
-     *
-     * @param name to test
-     * @param ignoreNew whether to ignore new pets (pets that are not saved yet)
-     * @return the Pet with the given name, or null if no such Pet exists for this Owner
-     */
-    public Pet getPet(String name, boolean ignoreNew) {
-        for (Pet pet : getPets()) {
-            String compName = pet.getName();
-            if (compName != null && compName.equalsIgnoreCase(name)) {
-                if (!ignoreNew || !pet.isNew()) {
-                    return pet;
-                }
-            }
-        }
-        return null;
-    }
+	/**
+	 * Return the Pet with the given name, or null if none found for this Owner.
+	 * @param name to test
+	 * @param ignoreNew whether to ignore new pets (pets that are not saved yet)
+	 * @return the Pet with the given name, or null if no such Pet exists for this Owner
+	 */
+	public Pet getPet(String name, boolean ignoreNew) {
+		for (Pet pet : getPets()) {
+			String compName = pet.getName();
+			if (compName != null && compName.equalsIgnoreCase(name)) {
+				if (!ignoreNew || !pet.isNew()) {
+					return pet;
+				}
+			}
+		}
+		return null;
+	}
+
+	@Override
+	public String toString() {
+		return new ToStringCreator(this).append("id", this.getId())
+			.append("new", this.isNew())
+			.append("lastName", this.getLastName())
+			.append("firstName", this.getFirstName())
+			.append("address", this.address)
+			.append("city", this.city)
+			.append("telephone", this.telephone)
+			.toString();
+	}
+
+	/**
+	 * Adds the given {@link Visit} to the {@link Pet} with the given identifier.
+	 * @param petId the identifier of the {@link Pet}, must not be {@literal null}.
+	 * @param visit the visit to add, must not be {@literal null}.
+	 */
+	public void addVisit(Integer petId, Visit visit) {
+
+		Assert.notNull(petId, "Pet identifier must not be null!");
+		Assert.notNull(visit, "Visit must not be null!");
+
+		Pet pet = getPet(petId);
+
+		Assert.notNull(pet, "Invalid Pet identifier!");
+
+		pet.addVisit(visit);
+	}
 
-    @Override
-    public String toString() {
-        return new ToStringCreator(this)
-                .append("id", this.getId())
-                .append("new", this.isNew())
-                .append("lastName", this.getLastName())
-                .append("firstName", this.getFirstName())
-                .append("address", this.address)
-                .append("city", this.city)
-                .append("telephone", this.telephone)
-                .toString();
-    }
 }