Fix OFT 2.0.0 self-trace

# Description
The self-trace of OFT 2.0.0 shows 18 error that need to be fixed.

## Steps to Reproduce
1. Run
   ```bash
   oft trace doc/system_requirements.md doc/design.md src/main/java src/test/java
   ```
1. Check results

## Expected behavior
Full coverage

# Environment
- OFT: 2.0.0