/usr/share/php/Aws/CloudWatch/Exception/ is in php-aws-sdk 2.7.2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/Aws/CloudWatch/Exception/CloudWatchException.php
/usr/share/php/Aws/CloudWatch/Exception/InternalServiceException.php
/usr/share/php/Aws/CloudWatch/Exception/InvalidFormatException.php
/usr/share/php/Aws/CloudWatch/Exception/InvalidNextTokenException.php
/usr/share/php/Aws/CloudWatch/Exception/InvalidParameterCombinationException.php
/usr/share/php/Aws/CloudWatch/Exception/InvalidParameterValueException.php
/usr/share/php/Aws/CloudWatch/Exception/LimitExceededException.php
/usr/share/php/Aws/CloudWatch/Exception/MissingRequiredParameterException.php
/usr/share/php/Aws/CloudWatch/Exception/ResourceNotFoundException.php