Suppress warnings

forge-gui/src/main/java/forge/tournament/system/AbstractTournament.java

@@ -1,6 +1,7 @@
 package forge.tournament.system;
 
 import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
+
 import forge.LobbyPlayer;
 import forge.player.GamePlayerUtil;
 import forge.util.MyRandom;
@@ -10,6 +11,7 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
+@SuppressWarnings("serial")
 public abstract class AbstractTournament implements Serializable {
     protected int activeRound;
     protected int totalRounds;

forge-gui/src/main/java/forge/tournament/system/TournamentBracket.java

@@ -3,6 +3,7 @@ package forge.tournament.system;
 import java.util.ArrayList;
 import java.util.List;
 
+@SuppressWarnings("serial")
 public class TournamentBracket extends AbstractTournament {
     // Bracket implies single elimination. For non-single elimination, use Swiss or RoundRobin
     public TournamentBracket(int ttlRnds, int pairingAmount) {

forge-gui/src/main/java/forge/tournament/system/TournamentRoundRobin.java

@@ -2,6 +2,7 @@ package forge.tournament.system;
 
 import java.util.List;
 
+@SuppressWarnings("serial")
 public class TournamentRoundRobin extends AbstractTournament {
     // Round Robin tournaments where you play everyone in your group/pod. Declare winner or break to top X
     public TournamentRoundRobin(int ttlRnds, List<TournamentPlayer> allPlayers) {

forge-gui/src/main/java/forge/tournament/system/TournamentSwiss.java

@@ -2,6 +2,7 @@ package forge.tournament.system;
 
 import java.util.List;
 
+@SuppressWarnings("serial")
 public class TournamentSwiss extends AbstractTournament {
 
     public TournamentSwiss(int ttlRnds, List<TournamentPlayer> allPlayers) {