Proyecto con Maven

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La siguiente configuración de un proyecto web funciona correctamente en un servidor Apache Tomcat 9.x.

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.pablomonteserin</groupId>
  <artifactId>calidades-futbol-jpa</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  
  	<properties>
		<hibernate.version>5.4.2.Final</hibernate.version>
		<spring.version>5.1.7.RELEASE</spring.version>
		<jstl.version>1.2</jstl.version>
		<servletapi.version>4.0.1</servletapi.version>

		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<maven.compiler.source>1.8</maven.compiler.source>
		<maven.compiler.target>1.8</maven.compiler.target>
	</properties>
	
	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>3.8.1</version>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-core</artifactId>
			<version>${hibernate.version}</version>
		</dependency>

		<!-- Entity manager which is required for JPA -->
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-entitymanager</artifactId>
			<version>${hibernate.version}</version>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>8.0.16</version>
		</dependency>
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>javax.servlet-api</artifactId>
			<version>3.0.1</version>
			<scope>provided</scope>
		</dependency>
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>jsp-api</artifactId>
			<version>2.0</version>
			<scope>provided</scope>
		</dependency>
		<!-- https://mvnrepository.com/artifact/javax.servlet.jsp.jstl/jstl-api -->
		<dependency>
			<groupId>jstl</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>
	</dependencies>
	
	<build>
		<plugins>		
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-war-plugin</artifactId>
				<version>3.2.2</version>
			</plugin>
		</plugins>
	</build>
	
</project>

src/main/resources/META-INF/persistence.xml
(habrá que crear la carpeta META-INF)

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1"
	xmlns="http://xmlns.jcp.org/xml/ns/persistence"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
	<persistence-unit name="TEST_PERSISTENCE_JPA"
		transaction-type="RESOURCE_LOCAL">
		<class>com.pablo.clase.persistence.model.Customer</class>
		<class>com.pablo.clase.persistence.model.Address</class>

		<properties>
			<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
			<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/prueba-jpa?serverTimezone=UTC" />
			<property name="javax.persistence.jdbc.user" value="pm" />
			<property name="javax.persistence.jdbc.password" value="pp" />

			<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL8Dialect" />

			<!-- hace cambios -->
			<property name="hibernate.hbm2ddl.auto" value="update" />

			<!-- si los cambios los fastidian todo, no hace cambios -->
			<!-- <property name="hibernate.hbm2ddl.auto" value="validate" /> -->

			<!-- <property name="hibernate.hbm2ddl.auto" value="create-drop" /> -->
			<property name="show_sql" value="true" />
		</properties>
	</persistence-unit>
</persistence>