Added doc comments

components/apimgt-extensions/org.wso2.carbon.apimgt.handlers/src/main/java/org.wso2.carbon.apimgt.handlers/AuthenticationHandler.java

@@ -39,6 +39,9 @@ import java.net.URISyntaxException;
 import java.util.HashMap;
 import java.util.Map;
 
+/**
+ * Synapse gateway handler for API authentication
+ */
 public class AuthenticationHandler extends AbstractHandler {
     private static final Log log = LogFactory.getLog(AuthenticationHandler.class);
     private static HandlerDescription EMPTY_HANDLER_METADATA = new HandlerDescription("API Security Handler");

components/apimgt-extensions/org.wso2.carbon.apimgt.handlers/src/main/java/org.wso2.carbon.apimgt.handlers/utils/Utils.java

@@ -46,6 +46,9 @@ import java.net.URISyntaxException;
 import java.util.HashMap;
 import java.util.Map;
 
+/**
+ * Contains util methods for synapse gateway authentication handler
+ */
 public class Utils {
 
     private static final Log log = LogFactory.getLog(Utils.class);