Update for Spigot and mavenize.

src/main/java/com/garbagemule/MobArena/ArenaListener.java

@@ -56,6 +56,7 @@ import com.garbagemule.MobArena.region.RegionPoint;
 import com.garbagemule.MobArena.repairable.*;
 import com.garbagemule.MobArena.util.TextUtils;
 import com.garbagemule.MobArena.waves.MABoss;
+import org.bukkit.projectiles.ProjectileSource;
 
 public class ArenaListener
 {
@@ -540,7 +541,10 @@ public class ArenaListener
 
         // Make sure to grab the owner of a projectile/pet
         if (damager instanceof Projectile) {
-            damager = ((Projectile) damager).getShooter();
+            ProjectileSource shooter = ((Projectile) damager).getShooter();
+            if (shooter instanceof Entity) {
+                damager = (Entity) shooter;
+            }
         }
         else if (damager instanceof Wolf && arena.hasPet(damager)) {
             damager = (Player) ((Wolf) damager).getOwner();
@@ -626,7 +630,10 @@ public class ArenaListener
             damager = edbe.getDamager();
 
             if (damager instanceof Projectile) {
-                damager = ((Projectile) damager).getShooter();
+                ProjectileSource shooter = ((Projectile) damager).getShooter();
+                if (shooter instanceof Entity) {
+                    damager = (Entity) shooter;
+                }
             }
 
             // Repair weapons if necessary

src/main/java/com/garbagemule/MobArena/commands/setup/ClassChestCommand.java

@@ -8,10 +8,13 @@ import com.garbagemule.MobArena.commands.CommandInfo;
 import com.garbagemule.MobArena.commands.Commands;
 import com.garbagemule.MobArena.framework.ArenaMaster;
 import com.garbagemule.MobArena.util.config.ConfigUtils;
+import org.bukkit.Material;
 import org.bukkit.block.Block;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
 
+import java.util.HashSet;
+
 import static com.garbagemule.MobArena.util.config.ConfigUtils.setLocation;
 
 @CommandInfo(
@@ -39,11 +42,10 @@ public class ClassChestCommand implements Command {
         }
 
         Player p = (Player) sender;
-        Block b = p.getTargetBlock(null, 10);
+        Block b = p.getTargetBlock(new HashSet<Material>(), 10);
 
         switch (b.getType()) {
             case CHEST:
-            case LOCKED_CHEST:
             case ENDER_CHEST:
             case TRAPPED_CHEST:
                 break;

src/main/java/com/garbagemule/MobArena/metrics/Metrics.java

@@ -354,7 +354,7 @@ public class Metrics {
         boolean onlineMode = Bukkit.getServer().getOnlineMode(); // TRUE if online mode is enabled
         String pluginVersion = description.getVersion();
         String serverVersion = Bukkit.getVersion();
-        int playersOnline = Bukkit.getServer().getOnlinePlayers().length;
+        int playersOnline = Bukkit.getServer().getOnlinePlayers().size();
  
         // END server software specific section -- all code below does not use any code outside of this class / Java