Connector/J not working

Program returns this error:

Code:

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java.lang.NoClassDefFoundError: com/mysql/jdbc/DocsConnectionPropsHelper
Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.DocsConnectionPropsHelper
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
Exception in thread "main"

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I've added the Connector/J JAR file to the project in Eclipse, but it just doesn't seem to be working. :(

Trying to get it working with this program:

Code:

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import java.sql.*;

class Connect
{
        public static void main(String args[])
        {
                Connection conn = null;
          try
          {
              String userName = "user";
              String password = "pass";
              String url = "jdbc:mysql://host:port/database";
              Class.forName ("com.mysql.jdbc.Driver").newInstance ();
              conn = DriverManager.getConnection (url, userName, password);
              System.out.println ("Database connection established");
          }
          catch (Exception e)
          {
                                System.out.println(e);
          }
          finally
          {
              if (conn != null)
              {
                  try
                  {
                      conn.close ();
                      System.out.println ("Database connection terminated");
                  }
                  catch (Exception e) { /* ignore close errors */ }
              }
          }
        }
}

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