conf/application.conf:

db {
    default.driver=com.mysql.jdbc.Driver
    default.url="jdbc:mysql://127.0.0.1/project?characterEncoding=UTF-8"
    default.user=user
    default.password="password"

    default.jndiName=DefaultDS
    default.logSql=true
}

jpa.default=defaultPersistenceUnit

//-----------------------------------------------------------------------
build.sbt:

libraryDependencies ++= Seq(
    javaJpa,
    "org.hibernate" % "hibernate-entitymanager" % "5.2.8.Final"
)

//-----------------------------------------------------------------------
conf/META-INF/persistence.xml:

<persistence 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"
             version="2.1">

    <persistence-unit name="defaultPersistenceUnit" transaction-type="RESOURCE_LOCAL">
        <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
        <non-jta-data-source>DefaultDS</non-jta-data-source>
        <properties>
            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect"/>
            <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>
//-----------------------------------------------------------------------