Fix exceptions and logs

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/ConfigOperationMSSQLDAOImpl.java

@@ -70,9 +70,9 @@ public class ConfigOperationMSSQLDAOImpl extends GenericOperationDAOImpl {
                 }
             }
         } catch (SQLException e) {
-            String msg = "Error occurred while adding command operation";
+            String msg = "Error occurred while adding command operation" + operation.getId();
             log.error(msg, e);
-            throw new OperationManagementDAOException(msg);
+            throw new OperationManagementDAOException(msg, e);
         }
     }
 
@@ -143,12 +143,12 @@ public class ConfigOperationMSSQLDAOImpl extends GenericOperationDAOImpl {
             String msg = "IO Error occurred while de serialize the policy operation " +
                     "object";
             log.error(msg, e);
-            throw new OperationManagementDAOException(msg);
+            throw new OperationManagementDAOException(msg, e);
         } catch (ClassNotFoundException e) {
             String msg = "Class not found error occurred while de serialize the policy " +
                     "operation object";
             log.error(msg, e);
-            throw new OperationManagementDAOException(msg);
+            throw new OperationManagementDAOException(msg, e);
         } catch (SQLException e) {
             String msg = "SQL Error occurred while retrieving the policy operation " +
                     "object available for the id '"
@@ -190,12 +190,12 @@ public class ConfigOperationMSSQLDAOImpl extends GenericOperationDAOImpl {
             String msg = "IO Error occurred while de serialize the configuration " +
                     "operation object";
             log.error(msg, e);
-            throw new OperationManagementDAOException(msg);
+            throw new OperationManagementDAOException(msg, e);
         } catch (ClassNotFoundException e) {
             String msg = "Class not found error occurred while de serialize the " +
                     "configuration operation object";
             log.error(msg, e);
-            throw new OperationManagementDAOException(msg);
+            throw new OperationManagementDAOException(msg, e);
         } catch (SQLException e) {
             String msg = "SQL error occurred while retrieving the operation available " +
                     "for the device'" + enrolmentId + "' with status '" + status.toString();