Do not modify player's air level before he logs in

src/main/java/fr/xephi/authme/AuthMe.java

@@ -17,6 +17,7 @@ import fr.xephi.authme.initialization.TaskCloser;
 import fr.xephi.authme.listener.BlockListener;
 import fr.xephi.authme.listener.EntityListener;
 import fr.xephi.authme.listener.PlayerListener;
+import fr.xephi.authme.listener.PlayerListener111;
 import fr.xephi.authme.listener.PlayerListener16;
 import fr.xephi.authme.listener.PlayerListener18;
 import fr.xephi.authme.listener.PlayerListener19;
@@ -301,6 +302,11 @@ public class AuthMe extends JavaPlugin {
         if (isClassLoaded("org.bukkit.event.player.PlayerSwapHandItemsEvent")) {
             pluginManager.registerEvents(injector.getSingleton(PlayerListener19.class), this);
         }
+
+        // Register listener for 1.11 events if available
+        if (isClassLoaded("org.bukkit.event.entity.EntityAirChangeEvent")) {
+            pluginManager.registerEvents(injector.getSingleton(PlayerListener111.class), this);
+        }
     }
 
     /**

src/main/java/fr/xephi/authme/listener/PlayerListener111.java

@@ -0,0 +1,24 @@
+package fr.xephi.authme.listener;
+
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.entity.EntityAirChangeEvent;
+
+import javax.inject.Inject;
+
+/**
+ * Listener of player events for events introduced in Minecraft 1.11.
+ */
+public class PlayerListener111 implements Listener {
+
+    @Inject
+    private ListenerService listenerService;
+
+    @EventHandler(ignoreCancelled = true, priority = EventPriority.LOWEST)
+    public void onPlayerAirChange(EntityAirChangeEvent event) {
+        if (listenerService.shouldCancelEvent(event)) {
+            event.setCancelled(true);
+        }
+    }
+}

src/test/java/fr/xephi/authme/listener/PlayerListener111Test.java

@@ -0,0 +1,30 @@
+package fr.xephi.authme.listener;
+
+import org.bukkit.event.entity.EntityAirChangeEvent;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.runners.MockitoJUnitRunner;
+
+import static fr.xephi.authme.listener.EventCancelVerifier.withServiceMock;
+
+/**
+ * Test for {@link PlayerListener111}.
+ */
+@RunWith(MockitoJUnitRunner.class)
+public class PlayerListener111Test {
+
+    @InjectMocks
+    private PlayerListener111 listener;
+
+    @Mock
+    private ListenerService listenerService;
+
+    @Test
+    public void shouldCancelEvent() {
+        withServiceMock(listenerService)
+            .check(listener::onPlayerAirChange, EntityAirChangeEvent.class);
+    }
+
+}