some Testing with Blockdisplays

src/main/java/eu/mhsl/minecraft/pixelblocks/PixelBlocks.java

@@ -1,7 +1,11 @@
 package eu.mhsl.minecraft.pixelblocks;
 
+import commands.ChessCommand;
+import listeners.PlayerJumpListener;
 import org.bukkit.plugin.java.JavaPlugin;
 
+import java.util.Objects;
+
 public final class PixelBlocks extends JavaPlugin {
     public static PixelBlocks plugin;
 
@@ -9,6 +13,8 @@ public final class PixelBlocks extends JavaPlugin {
     public void onEnable() {
         PixelBlocks.plugin = this;
         this.getLogger().info("Hello World");
+        getServer().getPluginManager().registerEvents(new PlayerJumpListener(), this);
+        Objects.requireNonNull(getCommand("chess")).setExecutor(new ChessCommand());
     }
 
     @Override