Add default Excavation XP values to config

src/main/java/com/gmail/nossr50/config/hocon/experience/ConfigExperienceExcavation.java

@@ -1,7 +1,36 @@
 package com.gmail.nossr50.config.hocon.experience;
 
+import ninja.leaping.configurate.objectmapping.Setting;
 import ninja.leaping.configurate.objectmapping.serialize.ConfigSerializable;
+import org.bukkit.Material;
+
+import java.util.HashMap;
 
 @ConfigSerializable
 public class ConfigExperienceExcavation {
+
+    private final static HashMap<String, Integer> EXCAVATION_EXPERIENCE_DEFAULT;
+
+    static {
+        EXCAVATION_EXPERIENCE_DEFAULT = new HashMap<>();
+        EXCAVATION_EXPERIENCE_DEFAULT.put(Material.CLAY.getKey().toString(), 40);
+        EXCAVATION_EXPERIENCE_DEFAULT.put(Material.DIRT.getKey().toString(), 40);
+        EXCAVATION_EXPERIENCE_DEFAULT.put(Material.COARSE_DIRT.getKey().toString(), 40);
+        EXCAVATION_EXPERIENCE_DEFAULT.put(Material.PODZOL.getKey().toString(), 40);
+        EXCAVATION_EXPERIENCE_DEFAULT.put(Material.GRASS_BLOCK.getKey().toString(), 40);
+        EXCAVATION_EXPERIENCE_DEFAULT.put(Material.GRAVEL.getKey().toString(), 40);
+        EXCAVATION_EXPERIENCE_DEFAULT.put(Material.MYCELIUM.getKey().toString(), 40);
+        EXCAVATION_EXPERIENCE_DEFAULT.put(Material.SAND.getKey().toString(), 40);
+        EXCAVATION_EXPERIENCE_DEFAULT.put(Material.RED_SAND.getKey().toString(), 40);
+        EXCAVATION_EXPERIENCE_DEFAULT.put(Material.SNOW.getKey().toString(), 20);
+        EXCAVATION_EXPERIENCE_DEFAULT.put(Material.SNOW_BLOCK.getKey().toString(), 40);
+        EXCAVATION_EXPERIENCE_DEFAULT.put(Material.SOUL_SAND.getKey().toString(), 40);
+    }
+
+    @Setting(value = "Excavation-Experience")
+    private HashMap<String, Integer> excavationExperienceMap;
+
+    public HashMap<String, Integer> getExcavationExperienceMap() {
+        return excavationExperienceMap;
+    }
 }