You will need to import javax.persistence.Entity and javax.persistence.Id. I believe their jar is also included in

<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-core --><dependency>    <groupId>org.hibernate</groupId>    <artifactId>hibernate-core</artifactId>    <version>5.2.2.Final</version></dependency>

Analysis

Please note that some of dependency definitions are out of the scope of the dependencies element (see TODO:):

<dependencies>    …</dependencies><!-- TODO: Out-of-the-scope dependency definitions! --><!-- Hibernate--><dependency>    <groupId>org.hibernate</groupId>    <artifactId>hibernate-entitymanager</artifactId>    <version>3.6.0.Final</version></dependency><dependency>    <groupId>org.hibernate</groupId>    <artifactId>hibernate-validator</artifactId>    <version>4.1.0.Final</version></dependency><!-- MySQL Connector--><dependency>    <groupId>mysql</groupId>    <artifactId>mysql-connector-java</artifactId>    <version>5.1.6</version></dependency>…

Solution

Just move the out-of-the-scope dependency definitions into the dependencies element.

Just switched my code into the tag <dependencies> … </dependencies>

<dependencies>        <dependency>            <groupId>org.hibernate</groupId>            <artifactId>hibernate-entitymanager</artifactId>            <version>3.6.0.Final</version>        </dependency>        <dependency>            <groupId>org.hibernate</groupId>            <artifactId>hibernate-validator</artifactId>            <version>4.1.0.Final</version>        </dependency>        <!-- MySQL Connector-->        <dependency>            <groupId>mysql</groupId>            <artifactId>mysql-connector-java</artifactId>            <version>5.1.6</version>        </dependency></dependencies>