diff --git a/pom.xml b/pom.xml
index 634043bee3793623c589d71164eeae2546f33b3e..034c1c627998d00224fe7a928f777fb789628ea4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -62,6 +62,10 @@
 
 		<!-- Plugins versions -->
 		<wildfly.maven.plugin.version>1.1.0.Alpha4</wildfly.maven.plugin.version>
+		<maven.compiler.plugin.version>3.3</maven.compiler.plugin.version>
+		<maven.source.plugin.version>2.4</maven.source.plugin.version>
+		<maven.javadoc.plugin.version>2.10.3</maven.javadoc.plugin.version>
+		<maven.deploy.plugin.version>2.8.2</maven.deploy.plugin.version>
 		<maven.dependency.plugin.version>2.10</maven.dependency.plugin.version>
 		<maven.surefire.plugin.version>2.18.1</maven.surefire.plugin.version>
 		<maven.resources.plugin.version>2.7</maven.resources.plugin.version>
@@ -243,6 +247,26 @@
 		</plugins>
 		<pluginManagement>
 			<plugins>
+				<plugin>
+					<groupId>org.apache.maven.plugins</groupId>
+					<artifactId>maven-compiler-plugin</artifactId>
+					<version>${maven.compiler.plugin.version}</version>
+				</plugin>
+				<plugin>
+					<groupId>org.apache.maven.plugins</groupId>
+					<artifactId>maven-javadoc-plugin</artifactId>
+					<version>${maven.javadoc.plugin.version}</version>
+				</plugin>
+				<plugin>
+					<groupId>org.apache.maven.plugins</groupId>
+					<artifactId>maven-source-plugin</artifactId>
+					<version>${maven.source.plugin.version}</version>
+				</plugin>
+				<plugin>
+					<groupId>org.apache.maven.plugins</groupId>
+					<artifactId>maven-deploy-plugin</artifactId>
+					<version>${maven.deploy.plugin.version}</version>
+				</plugin>
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-dependency-plugin</artifactId>
diff --git a/service/src/main/java/es/uvigo/esei/xcs/service/OwnerService.java b/service/src/main/java/es/uvigo/esei/xcs/service/OwnerService.java
index b2fe2466ddf46bb9a8a01e57da1e641757b59929..f1456574bf7bee89ff6d134cbdce495460f6b48e 100644
--- a/service/src/main/java/es/uvigo/esei/xcs/service/OwnerService.java
+++ b/service/src/main/java/es/uvigo/esei/xcs/service/OwnerService.java
@@ -90,6 +90,7 @@ public class OwnerService {
 	 * Updates a new owner. If the owner is not stored, it will be persisted.
 	 * 
 	 * @param owner an owner to be updated.
+	 * @return the updated owner.
 	 * @throws IllegalArgumentException if {@code owner} is {@code null}.
 	 */
 	public Owner update(Owner owner) {
diff --git a/service/src/main/java/es/uvigo/esei/xcs/service/PetService.java b/service/src/main/java/es/uvigo/esei/xcs/service/PetService.java
index 37d29d165b4a2b23990270afd3b05b7ffeb7a071..8993f61c233d4378b97025db1b1d2097f403d64e 100644
--- a/service/src/main/java/es/uvigo/esei/xcs/service/PetService.java
+++ b/service/src/main/java/es/uvigo/esei/xcs/service/PetService.java
@@ -89,7 +89,8 @@ public class PetService {
 	 * Updates the information of a pet. If the pet is not stored, it will be
 	 * created.
 	 * 
-	 * @param pet a pet to be updated. 
+	 * @param pet a pet to be updated.
+	 * @return the updated pet.
 	 * @throws IllegalArgumentException if the pet has no owner.
 	 * @throws EJBAccessException if the pet's owner is not the current user.
 	 */