checkFreePosition Methode vollendet.

Change-Id: Ia67cea16e995449ec5c85abb91368111803e9f6d
Signed-off-by: Philip <D059341@WDFN00288194A>
Merge branch 'master' of https://github.com/RWojtas/SEWS13.git
Singleton Pattern implementiert

Change-Id: I2a1d4e36ca3464a43f90c2fe2c773a5dcbefa2a1
Signed-off-by: Philip <D059341@WDFN00288194A>
Merge branch 'master' of https://github.com/RWojtas/SEWS13.git