base for cobblestone generator and levels

plugin/src/main/java/com/alttd/cometskyblock/configuration/CobblestoneGeneratorConfiguration.java

@@ -0,0 +1,16 @@
+package com.alttd.cometskyblock.configuration;
+
+import com.alttd.cometskyblock.island.CobblestoneGeneratorLevel;
+import lombok.Getter;
+import org.spongepowered.configurate.objectmapping.ConfigSerializable;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Getter
+@ConfigSerializable
+@SuppressWarnings({"CanBeFinal", "FieldMayBeFinal"})
+public class CobblestoneGeneratorConfiguration implements Configuration {
+
+    private List<CobblestoneGeneratorLevel> levels = new ArrayList<>();
+}