Make LandUnclaimAllEvent Cancellable

src/main/java/com/massivecraft/factions/cmd/CmdUnclaimall.java

@@ -44,7 +44,9 @@ public class CmdUnclaimall extends FCommand {
 
         LandUnclaimAllEvent unclaimAllEvent = new LandUnclaimAllEvent(myFaction, fme);
         Bukkit.getServer().getPluginManager().callEvent(unclaimAllEvent);
-        // this event cannot be cancelled
+        if (unclaimAllEvent.isCancelled()) {
+            return;
+        }
 
         Board.getInstance().unclaimAll(myFaction.getId());
         myFaction.msg(TL.COMMAND_UNCLAIMALL_UNCLAIMED, fme.describeTo(myFaction, true));

src/main/java/com/massivecraft/factions/event/LandUnclaimAllEvent.java

@@ -3,8 +3,10 @@ package com.massivecraft.factions.event;
 import com.massivecraft.factions.FPlayer;
 import com.massivecraft.factions.Faction;
 import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
 
-public class LandUnclaimAllEvent extends FactionPlayerEvent {
+public class LandUnclaimAllEvent extends FactionPlayerEvent implements Cancellable {
+    private boolean cancelled;
 
     public LandUnclaimAllEvent(Faction f, FPlayer p) {
         super(f, p);
@@ -45,4 +47,14 @@ public class LandUnclaimAllEvent extends FactionPlayerEvent {
     public Player getPlayer() {
         return getfPlayer().getPlayer();
     }
+
+    @Override
+    public boolean isCancelled() {
+        return cancelled;
+    }
+
+    @Override
+    public void setCancelled(boolean cancelled) {
+        this.cancelled = cancelled;
+    }
 }