code cleanup

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/DeviceDAO.java

@@ -20,6 +20,9 @@ import org.wso2.carbon.device.mgt.core.dto.Status;
 
 import java.util.List;
 
+/**
+ * This class represents the key operations associated with persisting device related information
+ */
 public interface DeviceDAO {
 
     void addDevice(Device device) throws DeviceManagementDAOException;

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/DeviceTypeDAO.java

@@ -22,6 +22,9 @@ import org.wso2.carbon.device.mgt.core.dto.DeviceType;
 
 import java.util.List;
 
+/**
+ * This class represents the key operations associated with persisting device type related information
+ */
 public interface DeviceTypeDAO {
 
     void addDeviceType(DeviceType deviceType) throws DeviceManagementDAOException;