Tengo el siguiente hibernate.cfg.xml:

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>

        <property name="connection.url">jdbc:mysql://localhost:3306/userdb</property>
        <property name="connection.username">root</property>
        <property name="connection.password">1234</property>
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="dialect">org.hibernate.dialect.MySQL5Dialect</property>

        <property name="show_sql">true</property>

        <property name="format_sql">true</property>
        <property name="hbm2ddl.auto">create</property>
        <property name="connection.pool_size">1</property>
        <property name="current_session_context_class">thread</property>

        <mapping class="com.beingjavaguys.hbn.User" />

    </session-factory>
</hibernate-configuration>

Probé otro dialecto (org.hibernate.dialect.MySQLDialect) pero veo un viejo resultado

pom.xml:

...
    <dependencies>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>4.0.1.Final</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>4.2.0.Final</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate.common</groupId>
            <artifactId>hibernate-commons-annotations</artifactId>
            <version>4.0.1.Final</version>
            <classifier>tests</classifier>
        </dependency>
        <dependency>
            <groupId>org.hibernate.javax.persistence</groupId>
            <artifactId>hibernate-jpa-2.0-api</artifactId>
            <version>1.0.1.Final</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>4.0.1.Final</version>
        </dependency>
        <dependency>
            <groupId>javax.validation</groupId>
            <artifactId>validation-api</artifactId>
            <version>1.0.0.GA</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.27</version>
        </dependency>
        </dependencies>
</project>

Cuando invoca la siguiente línea de código:

    return new Configuration().configure().buildSessionFactory();

Veo el siguiente stacktrace:

ERROR: HHH000231: Schema export unsuccessful
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown database 'userdb'
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    ...
    at org.hibernate.tool.hbm2ddl.SuppliedConnectionProviderConnectionHelper.prepare(SuppliedConnectionProviderConnectionHelper.java:51)
    at org.hibernate.tool.hbm2ddl.DatabaseExporter.<init>(DatabaseExporter.java:52)
    at org.hibernate.tool.hbm2ddl.SchemaExport.execute(SchemaExport.java:368)
    at org.hibernate.tool.hbm2ddl.SchemaExport.create(SchemaExport.java:305)
    at org.hibernate.tool.hbm2ddl.SchemaExport.create(SchemaExport.java:294)
    at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:452)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1737)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1775)
    at com.beingjavaguys.hbn.HibernateUtil.buildSessionFactory(HibernateUtil.java:16)
    at com.beingjavaguys.hbn.HibernateUtil.<clinit>(HibernateUtil.java:12)
    at com.beingjavaguys.hbn.App.saveUser(App.java:45)
    at com.beingjavaguys.hbn.App.main(App.java:30)

¿Cuál es la razón de este problema?

¿Como arreglarlo?

PD

¡El esquema de base de datos no existe en MySql!

si agrego explícitamente el shema de la base de datos, todo funciona bien.

¿Dónde está la forma de crear un esquema desde la aplicación de Java?