diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/service/DeviceManagementProviderServiceImpl.java b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/service/DeviceManagementProviderServiceImpl.java
index 784b8683d5..c7f42afb46 100644
--- a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/service/DeviceManagementProviderServiceImpl.java
+++ b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/service/DeviceManagementProviderServiceImpl.java
@@ -51,8 +51,8 @@ import org.apache.http.protocol.HTTP;
 import org.wso2.carbon.CarbonConstants;
 import org.wso2.carbon.context.CarbonContext;
 import org.wso2.carbon.context.PrivilegedCarbonContext;
-import org.wso2.carbon.device.mgt.common.*;
 import org.wso2.carbon.device.mgt.common.ActivityPaginationRequest;
+import org.wso2.carbon.device.mgt.common.Billing;
 import org.wso2.carbon.device.mgt.common.Device;
 import org.wso2.carbon.device.mgt.common.DeviceEnrollmentInfoNotification;
 import org.wso2.carbon.device.mgt.common.DeviceIdentifier;
@@ -122,7 +122,14 @@ import org.wso2.carbon.device.mgt.core.cache.DeviceCacheKey;
 import org.wso2.carbon.device.mgt.core.cache.impl.DeviceCacheManagerImpl;
 import org.wso2.carbon.device.mgt.core.config.DeviceConfigurationManager;
 import org.wso2.carbon.device.mgt.core.config.DeviceManagementConfig;
-import org.wso2.carbon.device.mgt.core.dao.*;
+import org.wso2.carbon.device.mgt.core.dao.ApplicationDAO;
+import org.wso2.carbon.device.mgt.core.dao.BillingDAO;
+import org.wso2.carbon.device.mgt.core.dao.DeviceDAO;
+import org.wso2.carbon.device.mgt.core.dao.DeviceManagementDAOException;
+import org.wso2.carbon.device.mgt.core.dao.DeviceManagementDAOFactory;
+import org.wso2.carbon.device.mgt.core.dao.DeviceStatusDAO;
+import org.wso2.carbon.device.mgt.core.dao.DeviceTypeDAO;
+import org.wso2.carbon.device.mgt.core.dao.EnrollmentDAO;
 import org.wso2.carbon.device.mgt.core.dao.util.DeviceManagementDAOUtil;
 import org.wso2.carbon.device.mgt.core.device.details.mgt.DeviceDetailsMgtException;
 import org.wso2.carbon.device.mgt.core.device.details.mgt.DeviceInformationManager;
@@ -159,10 +166,9 @@ import java.sql.SQLException;
 import java.sql.Timestamp;
 import java.text.Format;
 import java.text.SimpleDateFormat;
-import java.util.*;
-import java.util.concurrent.TimeUnit;
 import java.util.ArrayList;
 import java.util.Calendar;
+import java.util.Collection;
 import java.util.Collections;
 import java.util.Date;
 import java.util.Enumeration;
@@ -171,6 +177,7 @@ import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Properties;
+import java.util.concurrent.TimeUnit;
 import java.util.concurrent.ExecutionException;
 import java.util.stream.Collectors;