code: @Override
      public DBParameterGroup createDBParameterGroup(CreateDBParameterGroupRequest request) {
          request = beforeClientExecution(request);
          return executeCreateDBParameterGroup(request);
      }
docs: <p>
  Creates a new DB parameter group.
  </p>
  <p>
  A DB parameter group is initially created with the default parameters for the database engine used by the DB
  instance. To provide custom values for any of the parameters, you must modify the group after creating it using
  <i>ModifyDBParameterGroup</i>. Once you've created a DB parameter group, you need to associate it with your DB
  instance using <i>ModifyDBInstance</i>. When you associate a new DB parameter group with a running DB instance,
  you need to reboot the DB instance without failover for the new DB parameter group and associated settings to
  take effect.
  </p>
  <important>
  <p>
  After you create a DB parameter group, you should wait at least 5 minutes before creating your first DB instance
  that uses that DB parameter group as the default parameter group. This allows Amazon Neptune to fully complete
  the create action before the parameter group is used as the default for a new DB instance. This is especially
  important for parameters that are critical when creating the default database for a DB instance, such as the
  character set for the default database defined by the <code>character_set_database</code> parameter. You can use
  the <i>Parameter Groups</i> option of the Amazon Neptune console or the <i>DescribeDBParameters</i> command to
  verify that your DB parameter group has been created or modified.
  </p>
  </important>
  
  @param createDBParameterGroupRequest
  @return Result of the CreateDBParameterGroup operation returned by the service.
  @throws DBParameterGroupQuotaExceededException
  Request would result in user exceeding the allowed number of DB parameter groups.
  @throws DBParameterGroupAlreadyExistsException
  A DB parameter group with the same name exists.
  @sample AmazonNeptune.CreateDBParameterGroup
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/neptune-2014-10-31/CreateDBParameterGroup" target="_top">AWS
  API Documentation</a>