[Fix] Throw when read/save fails

[Fix] Throw when read/save fails

Currently, read save didn't throw when failing on those operation.
From this patch, if an object fails to read, it throws an exception
to preven false positive on test result

**Self evaluation:**
1. Build test: [X]Passed [ ]Failed [ ]Skipped
2. Run test: [X]Passed [ ]Failed [ ]Skipped

Signed-off-by: Jihoon Lee <jhoon.it.lee@samsung.com>