Hotfix java 11 exception

SpigotCore_Main/src/de/steamwar/sql/DownloadSchematic.java

@@ -19,7 +19,8 @@
 
 package de.steamwar.sql;
 
-import javax.xml.bind.DatatypeConverter;
+import com.google.common.io.BaseEncoding;
+
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.sql.ResultSet;
@@ -48,7 +49,7 @@ public class DownloadSchematic {
         }
         cript.reset();
         cript.update((Instant.now().toString() + schem.getSchemOwner() + schem.getSchemID()).getBytes());
-        String hash = DatatypeConverter.printHexBinary(cript.digest());
+        String hash = BaseEncoding.base16().encode(cript.digest());
         SQL.update("INSERT INTO SchemDownload (SchemID, Link) VALUES (?, ?)", schem.getSchemID(), hash);
         return BASE + hash;
     }