import javax.persistence.Entity;
import javax.persistence.Id;


@Entity
public class Employee {

   private int empId;
   private String empName;
   
   @Id
   public int getEmpId() {
      return empId;
   }
   public void setEmpId(int empId) {
      this.empId = empId;
   }
   public String getEmpName() {
      return empName;
   }
   public void setEmpName(String empName) {
      this.empName = empName;
   }
}

<?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>

        <!-- Database connection settings -->
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="connection.url">jdbc:mysql://localhost:3306/HibernateDb</property>
        <property name="connection.username">root</property>
        <property name="connection.password">11</property>

        <!-- JDBC connection pool (use the built-in) -->
        <property name="connection.pool_size">2</property>

        <!-- SQL dialect -->
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>

        <!-- Enable Hibernate's current session context -->
        <property name="current_session_context_class">org.hibernate.context.ManagedSessionContext</property>

        <!-- Disable the second-level cache  -->
        <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>

        <!-- Echo all executed SQL to stdout -->
        <property name="show_sql">true</property>

         Drop and re-create the database schema on startup
<!--        <property name="hbm2ddl.auto">create</property>-->
<!---->
<!--        <mapping resource="org/hibernate/tutorial/domain/Event.hbm.xml"/>-->
<!--        <mapping resource="org/hibernate/tutorial/domain/Person.hbm.xml"/>-->

    </session-factory>

</hibernate-configuration>

import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.tool.hbm2ddl.SchemaExport;

public class TestEmployee {

   
   public static void main(String[] args) {
      
      AnnotationConfiguration config = new AnnotationConfiguration();
      config.addAnnotatedClass(Employee.class);
      config.configure("hibernate.cfg.xml");
      
      new SchemaExport(config).create(true, true);
         
   }

}

01:38:48,906  INFO Version:15 - Hibernate Annotations 3.4.0.GA
01:38:48,906  INFO Environment:560 - Hibernate 3.3.2.GA
Exception in thread "main" java.lang.ExceptionInInitializerError
   at org.hibernate.cfg.Configuration.reset(Configuration.java:217)
   at org.hibernate.cfg.AnnotationConfiguration.reset(AnnotationConfiguration.java:233)
   at org.hibernate.cfg.Configuration.<init>(Configuration.java:197)
   at org.hibernate.cfg.Configuration.<init>(Configuration.java:201)
   at org.hibernate.cfg.AnnotationConfiguration.<init>(AnnotationConfiguration.java:108)
   at com.hibernate.chapter1.TestEmployee.main(TestEmployee.java:11)
Caused by: java.lang.NullPointerException
   at org.hibernate.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:167)
   at org.hibernate.cfg.Environment.<clinit>(Environment.java:575)
   ... 6 more