@POST
  @Produces(MediaType.TEXT_PLAIN)
  @ApiOperation(value = "Creates a config group")
  @ApiImplicitParams({
    @ApiImplicitParam(dataType = CONFIG_GROUP_REQUEST_TYPE, paramType = PARAM_TYPE_BODY),
  })
  @ApiResponses({
    @ApiResponse(code = HttpStatus.SC_CREATED, message = MSG_SUCCESSFUL_OPERATION),
    @ApiResponse(code = HttpStatus.SC_BAD_REQUEST, message = MSG_INVALID_ARGUMENTS),
    @ApiResponse(code = HttpStatus.SC_UNAUTHORIZED, message = MSG_NOT_AUTHENTICATED),
    @ApiResponse(code = HttpStatus.SC_INTERNAL_SERVER_ERROR, message = MSG_SERVER_ERROR),
  })
  public Response createConfigGroup(String body, @Context HttpHeaders headers,
                                    @Context UriInfo ui) {
    return handleRequest(headers, body, ui, Request.Type.POST,
      createConfigGroupResource(m_clusterName, null));
  }
Handles POST /clusters/{clusterId}/config_groups
Create a new config group

@param body
@param headers
@param ui
@return
ambari-server/src/main/java/org/apache/ambari/server/api/services/ConfigGroupService.java