SpigotCore_Main/src/de/steamwar/core/Core.java

@@ -28,6 +28,10 @@ import de.steamwar.sql.SQL;
 import org.bukkit.Bukkit;
 import org.bukkit.plugin.java.JavaPlugin;
 
+import java.util.Optional;
+import java.util.concurrent.Callable;
+import java.util.logging.Logger;
+
 
 public class Core extends JavaPlugin{
 	private static Core instance;
@@ -82,4 +86,69 @@ public class Core extends JavaPlugin{
 	private static void setInstance(Core instance) {
 		Core.instance = instance;
 	}
+	
+	public static void versionDependantCall(Runnable v12, Runnable v15) {
+		switch (getVersion()) {
+			case 12:
+				v12.run();
+				break;
+			case 15:
+			default:
+				v15.run();
+				break;
+		}
+	}
+
+	public static <T> T versionDependantCall(ExceptionlessCallable<T> v12, ExceptionlessCallable<T> v15) {
+		switch (getVersion()) {
+			case 12:
+				return v12.call();
+			case 15:
+			default:
+				return v15.call();
+		}
+	}
+
+	public static void versionDependantCall(Runnable v8, Runnable v9, Runnable v10, Runnable v12, Runnable v14, Runnable v15) {
+		switch (Core.getVersion()) {
+			case 8:
+				v8.run();
+				break;
+			case 9:
+				v9.run();
+				break;
+			case 10:
+				v10.run();
+				break;
+			case 12:
+				v12.run();
+				break;
+			case 14:
+				v14.run();
+				break;
+			case 15:
+			default:
+				v15.run();
+				break;
+		}
+	}
+
+	public static <T> T versionDependantCall(ExceptionlessCallable<T> v8, ExceptionlessCallable<T> v9, ExceptionlessCallable<T> v10, ExceptionlessCallable<T> v12, ExceptionlessCallable<T> v14, ExceptionlessCallable<T> v15) {
+		switch (Core.getVersion()) {
+			case 8:
+				return v8.call();
+			case 9:
+				return v9.call();
+			case 10:
+				return v10.call();
+			case 12:
+				return v12.call();
+			case 14:
+				return v14.call();
+			case 15:
+			default:
+				return v15.call();
+		}
+	}
+	
 }

SpigotCore_Main/src/de/steamwar/core/ExceptionlessCallable.java

@@ -0,0 +1,6 @@
+package de.steamwar.core;
+
+@FunctionalInterface
+public interface ExceptionlessCallable<T> {
+    T call();
+}