<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD//EN"
        "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
   <session-factory>
           <!-- Database configuration -->
      <property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property>
      <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="hibernate.connection.url">jdbc:mysql://localhost/teacat</property>
        <property name="hibernate.connection.username">root</property>
        <property name="hibernate.connection.password">stalker13</property>
        <property name="hibernate.connection.autocommit">true</property>
        <property name="show_sql">true</property>
        <property name="hibernate.hbm2ddl.auto">update</property>
      
      <!-- Mapping files -->
      <mapping resource = "hibernate/classes/user.hbm.xml"/>
      
   </session-factory>
</hibernate-configuration>

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package = "teacat.core">
   
   <class name = "User">
      
      <id name = "id" column = "c_id">
         <generator class = "native"/>
      </id>
   
      <property name = "name" type = "string" column = "c_name" unique = "true" length = "64"/>
      <property name = "login" type = "string" column = "c_login" length = "64"/>
      <property name = "password" type = "string" column = "c_password" length = "40"/>
      <property name = "email" type = "string" column = "c_email" length = "64"/>
      <property name = "register" type = "timestamp" column = "c_register"/>
      <property name = "update" type = "timestamp" column = "c_update"/>
      
      <joined-subclass name = "teacat.registration.ContenderUser" table = "ContenderUser">
         <key column = "c_id"/>
         <property name = "activate" type = "string" column = "c_activate"/>
      </joined-subclass>
   
   </class>
   
</hibernate-mapping>

exception
javax.servlet.ServletException: Servlet execution threw an exception

root cause
java.lang.ExceptionInInitializerError
   teacat.registration.ContenderUserRegistration.isUnique(ContenderUserRegistration.java:65)
   teacat.registration.ContenderUserRegistration.checkName(ContenderUserRegistration.java:94)
   teacat.registration.ContenderUserRegistration.register(ContenderUserRegistration.java:40)
   ContenderRegistration.doPost(Unknown Source)
   javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
   javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

root cause
org.hibernate.MappingNotFoundException: resource: hibernate/classes/user.hbm.xml not found
   org.hibernate.cfg.Configuration.addResource(Configuration.java:665)
   org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1679)
   org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1647)
   org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1626)
   org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1600)
   org.hibernate.cfg.Configuration.configure(Configuration.java:1520)
   teacat.hibernate.HibernateUtil.<clinit>(HibernateUtil.java:22)
   teacat.registration.ContenderUserRegistration.isUnique(ContenderUserRegistration.java:65)
   teacat.registration.ContenderUserRegistration.checkName(ContenderUserRegistration.java:94)
   teacat.registration.ContenderUserRegistration.register(ContenderUserRegistration.java:40)
   ContenderRegistration.doPost(Unknown Source)
   javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
   javax.servlet.http.HttpServlet.service(HttpServlet.java:717)