diff --git a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/service/DeviceManagementProviderService.java b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/service/DeviceManagementProviderService.java
index 4aaf8bf06fb..bd0223e962f 100644
--- a/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/service/DeviceManagementProviderService.java
+++ b/components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/service/DeviceManagementProviderService.java
@@ -93,7 +93,7 @@ public interface DeviceManagementProviderService extends OperationManager {
     void updateDeviceEnrolmentInfo(Device device, EnrolmentInfo.Status active) throws DeviceManagementException;
 
     /**
-     * This method is used to retrieve list of devices based on the device status
+     * This method is used to retrieve list of devices based on the device status.
      *
      * @param status Device status
      * @return List of devices
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 197a9321e3f..3e05baf788b 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
@@ -492,8 +492,9 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
     public Device getDevice(DeviceIdentifier deviceId) throws DeviceManagementException {
         Device device;
         try {
+            DeviceManagementDAOFactory.openConnection();
             device = deviceDAO.getDevice(deviceId, this.getTenantId());
-        } catch (DeviceManagementDAOException e) {
+        } catch (DeviceManagementDAOException | SQLException e) {
             throw new DeviceManagementException("Error occurred while obtaining the device for id " +
                     "'" + deviceId.getId() + "'", e);
         } finally {
@@ -731,10 +732,8 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
                 DeviceManagementDAOFactory.closeConnection();
             }
             for (Device device : userDevices) {
-                Device dmsDevice =
-                        this.getPluginRepository().getDeviceManagementService(
-                                device.getType()).getDeviceManager().getDevice(
-                                new DeviceIdentifier(device.getDeviceIdentifier(), device.getType()));
+                Device dmsDevice = this.getDeviceManager(device.getType()).
+                        getDevice(new DeviceIdentifier(device.getDeviceIdentifier(), device.getType()));
                 if (dmsDevice != null) {
                     device.setFeatures(dmsDevice.getFeatures());
                     device.setProperties(dmsDevice.getProperties());
@@ -771,10 +770,8 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
             DeviceManagementDAOFactory.closeConnection();
         }
         for (Device device : allDevices) {
-            Device dmsDevice =
-                    this.getPluginRepository().getDeviceManagementService(
-                            device.getType()).getDeviceManager().getDevice(
-                            new DeviceIdentifier(device.getDeviceIdentifier(), device.getType()));
+            Device dmsDevice = this.getDeviceManager(device.getType()).
+                    getDevice(new DeviceIdentifier(device.getDeviceIdentifier(), device.getType()));
             if (dmsDevice != null) {
                 device.setFeatures(dmsDevice.getFeatures());
                 device.setProperties(dmsDevice.getProperties());
@@ -835,10 +832,8 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
         }
 
         for (Device device : allDevices) {
-            Device dmsDevice =
-                    this.getPluginRepository().getDeviceManagementService(
-                            device.getType()).getDeviceManager().getDevice(
-                            new DeviceIdentifier(device.getDeviceIdentifier(), device.getType()));
+            Device dmsDevice = this.getDeviceManager(device.getType()).
+                    getDevice(new DeviceIdentifier(device.getDeviceIdentifier(), device.getType()));
             if (dmsDevice != null) {
                 device.setFeatures(dmsDevice.getFeatures());
                 device.setProperties(dmsDevice.getProperties());
diff --git a/features/oauth-extensions/org.wso2.carbon.oauth.extensions.server.feature/pom.xml b/features/oauth-extensions/org.wso2.carbon.oauth.extensions.server.feature/pom.xml
index a20ebb17c68..eae36b42e94 100644
--- a/features/oauth-extensions/org.wso2.carbon.oauth.extensions.server.feature/pom.xml
+++ b/features/oauth-extensions/org.wso2.carbon.oauth.extensions.server.feature/pom.xml
@@ -37,14 +37,6 @@
     <description>This feature contains oauth functionality
     </description>
 
-    <!--<dependencies>-->
-
-        <!--<dependency>-->
-            <!--<groupId>org.wso2.mdm</groupId>-->
-            <!--<artifactId>dynamic-client-manager</artifactId>-->
-        <!--</dependency>-->
-    <!--</dependencies>-->
-
     <build>
         <plugins>
             <plugin>
@@ -101,8 +93,6 @@
                 </executions>
             </plugin>
 
-
-
             <plugin>
                 <groupId>org.wso2.maven</groupId>
                 <artifactId>carbon-p2-plugin</artifactId>
@@ -123,20 +113,6 @@
                                     <propertyDef>org.eclipse.equinox.p2.type.group:false</propertyDef>
                                 </properties>
                             </adviceFile>
-                            <!--<bundles>-->
-                                <!--<bundleDef>-->
-                                    <!--org.wso2.carbon.devicemgt:org.wso2.carbon.policy.mgt.core:${carbon.device.mgt.version}-->
-                                <!--</bundleDef>-->
-                                <!--<bundleDef>-->
-                                    <!--org.wso2.carbon.devicemgt:org.wso2.carbon.policy.mgt.common:${carbon.device.mgt.version}-->
-                                <!--</bundleDef>-->
-                                <!--<bundleDef>-->
-                                    <!--org.wso2.carbon.devicemgt:org.wso2.carbon.simple.policy.decision.point:${carbon.device.mgt.version}-->
-                                <!--</bundleDef>-->
-                                <!--<bundleDef>-->
-                                    <!--org.wso2.carbon.devicemgt:org.wso2.carbon.policy.information.point:${carbon.device.mgt.version}-->
-                                <!--</bundleDef>-->
-                            <!--</bundles>-->
                             <importFeatures>
                                 <importFeatureDef>org.wso2.carbon.core.server:${carbon.kernel.version}
                                 </importFeatureDef>
@@ -145,10 +121,6 @@
                     </execution>
                 </executions>
             </plugin>
-
-
-
-
         </plugins>
     </build>
 </project>