Adding the specific imports.

components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/GroupManagementServiceImpl.java

@@ -29,7 +29,11 @@ import org.wso2.carbon.device.mgt.common.DeviceIdentifier;
 import org.wso2.carbon.device.mgt.common.DeviceNotFoundException;
 import org.wso2.carbon.device.mgt.common.GroupPaginationRequest;
 import org.wso2.carbon.device.mgt.common.PaginationResult;
-import org.wso2.carbon.device.mgt.common.group.mgt.*;
+import org.wso2.carbon.device.mgt.common.group.mgt.DeviceGroup;
+import org.wso2.carbon.device.mgt.common.group.mgt.GroupAlreadyExistException;
+import org.wso2.carbon.device.mgt.common.group.mgt.GroupManagementException;
+import org.wso2.carbon.device.mgt.common.group.mgt.RoleDoesNotExistException;
+import org.wso2.carbon.device.mgt.common.group.mgt.GroupNotExistException;
 import org.wso2.carbon.device.mgt.core.service.GroupManagementProviderService;
 import org.wso2.carbon.device.mgt.jaxrs.beans.DeviceGroupList;
 import org.wso2.carbon.device.mgt.jaxrs.beans.DeviceList;