Travis build failing: error with `StandardFlashCard.java` file

[farbodsz]

...

:app:compileDebugJavaWithJavac
:app:compileDebugJavaWithJavac - is not incremental (e.g. outputs have changed, no previous execution, etc.).
/home/travis/build/FarbodSalamat-Zadeh/FlashcardsApp/app/src/main/java/com/satsumasoftware/flashcards/object/StandardFlashcard.java:27: error: class StandardFlashCard is public, should be declared in a file named StandardFlashCard.java
public class StandardFlashCard implements FlashCard {
       ^
1 error
:app:compileDebugJavaWithJavac FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

...

Here is a link to that build, for reference: https://travis-ci.org/FarbodSalamat-Zadeh/FlashcardsApp/builds/135327356

[farbodsz]

I think this got fixed, so I'm closing it. If not, then it can be reopened.