Fixing issues

components/device-mgt/org.wso2.carbon.device.mgt.extensions/src/main/java/org/wso2/carbon/device/mgt/extensions/device/type/template/exception/DeviceTypeMgtPluginException.java

@@ -22,6 +22,10 @@ package org.wso2.carbon.device.mgt.extensions.device.type.template.exception;
  */
 public class DeviceTypeMgtPluginException extends Exception{
 
+    public DeviceTypeMgtPluginException(String msg) {
+        super(msg);
+    }
+
     public DeviceTypeMgtPluginException(String msg, Exception nestedEx) {
         super(msg, nestedEx);
     }

components/device-mgt/org.wso2.carbon.device.mgt.extensions/src/main/java/org/wso2/carbon/device/mgt/extensions/device/type/template/util/DeviceTypeUtils.java

@@ -104,7 +104,10 @@ public class DeviceTypeUtils {
             int tenantId = PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantId();
             org.wso2.carbon.registry.core.service.RegistryService registryService = DeviceTypeExtensionDataHolder
                     .getInstance().getRegistryService();
-            return registryService == null ? null : registryService.getConfigSystemRegistry(tenantId);
+            if (registryService == null) {
+                throw new DeviceTypeMgtPluginException("Registry Service is not initialized properly");
+            }
+            return registryService.getConfigSystemRegistry(tenantId);
         } catch (RegistryException e) {
             throw new DeviceTypeMgtPluginException("Error in retrieving conf registry instance: " + e.getMessage(), e);
         }
@@ -113,14 +116,10 @@ public class DeviceTypeUtils {
     public static boolean putRegistryResource(String path, Resource resource) throws DeviceTypeMgtPluginException {
         try {
             Registry registry = getConfigurationRegistry();
-            if (registry == null) {
-                return false;
-            } else {
             registry.beginTransaction();
             registry.put(path, resource);
             registry.commitTransaction();
             return true;
-            }
         } catch (RegistryException e) {
             throw new DeviceTypeMgtPluginException(
                     "Error occurred while persisting registry resource : " + e.getMessage(), e);