Adding missing class comments.

components/device-mgt/org.wso2.carbon.device.mgt.core/src/test/java/org/wso2/carbon/device/mgt/core/mock/MockDataSource.java

@@ -24,6 +24,10 @@ import java.sql.SQLFeatureNotSupportedException;
 import java.util.logging.Logger;
 import javax.sql.DataSource;
 
+/**
+ * This is the mock data source implementation that will be used in the test cases.
+ *
+ */
 public class MockDataSource implements DataSource {
     private boolean throwException = false;
     private Connection connection;

components/device-mgt/org.wso2.carbon.device.mgt.core/src/test/java/org/wso2/carbon/device/mgt/core/operation/OperationManagementTests.java

@@ -45,7 +45,6 @@ import org.wso2.carbon.device.mgt.core.operation.mgt.ConfigOperation;
 import org.wso2.carbon.device.mgt.core.operation.mgt.OperationManagerImpl;
 import org.wso2.carbon.device.mgt.core.operation.mgt.PolicyOperation;
 import org.wso2.carbon.device.mgt.core.operation.mgt.ProfileOperation;
-import org.wso2.carbon.device.mgt.core.operation.mgt.dao.OperationManagementDAOFactory;
 import org.wso2.carbon.device.mgt.core.service.DeviceManagementProviderService;
 import org.wso2.carbon.utils.multitenancy.MultitenantConstants;