ONOS-2486 Adding swagger-based REST API documentation.

Change-Id: I237d973d73549ad30ddc638c1c201f024d344c70
diff --git a/web/api/src/main/java/org/onosproject/rest/resources/ConfigWebResource.java b/web/api/src/main/java/org/onosproject/rest/resources/ConfigWebResource.java
index 746b76a..b0db475 100644
--- a/web/api/src/main/java/org/onosproject/rest/resources/ConfigWebResource.java
+++ b/web/api/src/main/java/org/onosproject/rest/resources/ConfigWebResource.java
@@ -37,14 +37,20 @@
 import static javax.ws.rs.core.Response.Status.INTERNAL_SERVER_ERROR;
 
 /**
- * Resource that acts as an ancillary provider for uploading pre-configured
- * devices, ports and links.
+ * Inject devices, ports, links and end-station hosts.
  */
 @Path("config")
 public class ConfigWebResource extends BaseResource {
 
     private static Logger log = LoggerFactory.getLogger(ConfigWebResource.class);
 
+    /**
+     * Upload device, port, link and host data.
+     *
+     * @param input JSON blob
+     * @return 200 OK
+     * @throws IOException
+     */
     @POST
     @Path("topology")
     @Consumes(MediaType.APPLICATION_JSON)