Add new exception to check equality of elements

[abvg9]

In line 112 at the file src/com/ucm/dasi/catan/board/CatanBoard.java it's recommended to implement a runtime expcetion to handle this situation.

[notaphplover]

@abvg9 InvalidBoardElementException seems to be the right one, should this exception be a RuntimeException?

Keep in mind that it's not mandatory to place a throws clause if a runtime exception is thrown, so it is still possible to place the throws clause when needed.

[notaphplover]

@abvg9 Try to reference code with GitHub references in base of a certain commit. For example, the line you are referencing is this one

[abvg9]

@abvg9 InvalidBoardElementException seems to be the right one, should this exception be a RuntimeException?

Keep in mind that it's not mandatory to place a throws clause if a runtime exception is thrown, so it is still possible to place the throws clause when needed.

Okay, a runtime be said.