More cleanup and adds some helper functions to new utility classes

src/test/java/net/knarcraft/bookswithoutborders/util/EncryptionHelperTest.java

@@ -0,0 +1,16 @@
+package net.knarcraft.bookswithoutborders.util;
+
+import net.knarcraft.bookswithoutborders.utility.EncryptionHelper;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class EncryptionHelperTest {
+
+    @Test
+    public void getNumberKeyFromStringKey() {
+        String numberKey = EncryptionHelper.getNumberKeyFromStringKey("hello");
+        assertEquals("1714212124", numberKey);
+    }
+
+}