Fix 1.8 forge support

Forge/source/customskinloader/forge/ForgeMod.java

@@ -1,10 +1,40 @@
 package customskinloader.forge;
 
+import customskinloader.CustomSkinLoader;
+
 import net.minecraftforge.fml.common.Mod;
+import net.minecraftforge.fml.common.Mod.EventHandler;
+import net.minecraftforge.fml.common.event.FMLFingerprintViolationEvent;
 
 /**
- * Forge Mod Container for 1.13+
+ * Forge Mod Container
  */
-@Mod("customskinloader")
+@Mod(
+        value = "customskinloader",
+        modid = "customskinloader",
+        name = "CustomSkinLoader",
+        version = "@MOD_FULL_VERSION@",
+        clientSideOnly = true,
+        acceptedMinecraftVersions = "[1.8,)",
+        certificateFingerprint = "52885f395e68f42e9b3b629ba56ecf606f7d4269"
+)//1.13-
 public class ForgeMod {
-}
+
+    @EventHandler
+    public void fingerprintError(FMLFingerprintViolationEvent event) {
+        if (event.isDirectory()) return;//Development Environment
+
+        CustomSkinLoader.logger.warning("!!!Fingerprint ERROR!!!");
+        CustomSkinLoader.logger.warning("Failed to check fingerprint in file '" + event.getSource().getAbsolutePath() + "'.");
+        CustomSkinLoader.logger.warning("Excepted Fingerprint: " + event.getExpectedFingerprint());
+        if (event.getFingerprints().isEmpty()) {
+            CustomSkinLoader.logger.warning("No Fingerprint Founded.");
+        } else {
+            CustomSkinLoader.logger.warning("Founded Fingerprint: ");
+            for (String s : event.getFingerprints())
+                CustomSkinLoader.logger.warning(s);
+        }
+
+        throw new RuntimeException("Fingerprint ERROR, please **DO NOT MODIFY** any mod.");
+    }
+}