Erro Teste Conta

Erro inesperado ao executar a classe TesteConta (O arquivo persistence.xml está no diretório correto, dentro da META-INF, dentro da pasta src):

Console:

jun 26, 2018 11:48:29 PM org.hibernate.jpa.internal.util.LogHelper logPersistenceUnitInformation
INFO: HHH000204: Processing PersistenceUnitInfo [
    name: financas
    ...]
jun 26, 2018 11:48:29 PM org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {5.3.1.Final}
jun 26, 2018 11:48:29 PM org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
jun 26, 2018 11:48:29 PM org.hibernate.annotations.common.reflection.java.JavaReflectionManager <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {5.0.3.Final}
jun 26, 2018 11:48:29 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
WARN: HHH10001002: Using Hibernate built-in connection pool (not for production use!)
Exception in thread "main" javax.persistence.PersistenceException: No Persistence provider for EntityManager named financas
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:85)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54)
    at br.com.caelum.financas.teste.TesteConta.main(TesteConta.java:20)

Classe Conta:

package br.com.caelum.financas.modelo;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

@Entity
public class Conta {

    @Id
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    private Integer id;

    private String titular;

    private String banco;

    private String agencia;

    private String numero;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getTitular() {
        return titular;
    }

    public void setTitular(String titular) {
        this.titular = titular;
    }

    public String getBanco() {
        return banco;
    }

    public void setBanco(String banco) {
        this.banco = banco;
    }

    public String getAgencia() {
        return agencia;
    }

    public void setAgencia(String agencia) {
        this.agencia = agencia;
    }

    public String getNumero() {
        return numero;
    }

    public void setNumero(String numero) {
        this.numero = numero;
    }

}

Classe TesteConta:

package br.com.caelum.financas.teste;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;

import br.com.caelum.financas.modelo.Conta;

public class TesteConta {

    public static void main(String[] args) {

        Conta c = new Conta();

        c.setTitular("Leonardo");
        c.setBanco("Caixa Economica");
        c.setAgencia("123");
        c.setNumero("456");

        EntityManagerFactory emf = Persistence.createEntityManagerFactory("financas");

        EntityManager em = emf.createEntityManager();

        em.getTransaction().begin();
        em.persist(c);
        em.getTransaction().commit();

        em.close();
        emf.close();
    }

}

persistence.xml:

<persistence xmlns="http://java.sun.com/xml/ns/persistence"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
        http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
    version="2.0">

    <!-- unidade de persistencia com o nome financas -->
    <persistence-unit name="financas">

        <!-- Implementação do JPA, no nosso caso Hibernate -->
        <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>

        <!-- Aqui são listadas todas as entidades -->
        <class>br.com.caelum.financas.modelo.Conta</class>

        <properties>    
            <!-- Propriedades JDBC -->
            <property name="javax.persistence.jdbc.driver" 
                value="com.mysql.cj.jdbc.Driver" />

            <property name="javax.persistence.jdbc.url" 
                value="jdbc:mysql://localhost/financas?useSSL=false&amp;useTimezone=true&amp;serverTimezone=UTC" />

            <property name="javax.persistence.jdbc.user" value="root" />
            <property name="javax.persistence.jdbc.password" value="" />

            <!-- Configurações específicas do Hibernate -->
            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect" />

            <property name="hibernate.hbm2ddl.auto" value="update" />
            <property name="hibernate.show_sql" value="true" />
            <property name="hibernate.format_sql" value="true" />
        </properties>
    </persistence-unit>
</persistence>