misc cleanup

bukkit/src/main/java/me/lucko/luckperms/bukkit/LPBukkitPlugin.java

@@ -288,9 +288,7 @@ public class LPBukkitPlugin extends JavaPlugin implements LuckPermsPlugin {
         }
 
         // replace the temporary executor when the Bukkit one starts
-        getServer().getScheduler().runTaskAsynchronously(this, () -> {
-            scheduler.setUseBukkitAsync(true);
-        });
+        getServer().getScheduler().runTaskAsynchronously(this, () -> scheduler.setUseBukkitAsync(true));
 
         // Load any online users (in the case of a reload)
         for (Player player : getServer().getOnlinePlayers()) {

bukkit/src/main/java/me/lucko/luckperms/bukkit/messaging/BungeeMessagingService.java

@@ -64,12 +64,11 @@ public class BungeeMessagingService extends AbstractMessagingService implements
             @Override
             public void run() {
                 Collection<? extends Player> players = plugin.getServer().getOnlinePlayers();
-                if (players.isEmpty()) {
+                Player p = Iterables.getFirst(players, null);
+                if (p == null) {
                     return;
                 }
 
-                Player p = Iterables.getFirst(players, null);
-
                 ByteArrayDataOutput out = ByteStreams.newDataOutput();
                 out.writeUTF(message);
 

bukkit/src/main/java/me/lucko/luckperms/bukkit/migration/MigrationPowerfulPerms.java

@@ -66,6 +66,7 @@ import java.util.function.Consumer;
 
 import static me.lucko.luckperms.common.constants.Permission.MIGRATION;
 
+@SuppressWarnings("unchecked")
 public class MigrationPowerfulPerms extends SubCommand<Object> {
     private static Method getPlayerPermissionsMethod = null;
     private static Method getPlayerGroupsMethod = null;

bukkit/src/main/java/me/lucko/luckperms/bukkit/model/Injector.java

@@ -38,6 +38,7 @@ import java.util.concurrent.ConcurrentHashMap;
 /**
  * Injects a {@link LPPermissible} into a {@link Player}
  */
+@SuppressWarnings("unchecked")
 @UtilityClass
 public class Injector {
     private static final Map<UUID, LPPermissible> INJECTED_PERMISSIBLES = new ConcurrentHashMap<>();