#450 Make reload & messages functionality use NewSetting

- Change ReloadCommand to use the new setting functionality
- Check and construct the messages file in NewSetting
- Unrelated: change MessagesManager not to extend CustomConfiguration anymore

src/main/java/fr/xephi/authme/util/StringUtils.java

@@ -4,6 +4,7 @@ import net.ricecode.similarity.LevenshteinDistanceStrategy;
 import net.ricecode.similarity.StringSimilarityService;
 import net.ricecode.similarity.StringSimilarityServiceImpl;
 
+import java.io.File;
 import java.util.Arrays;
 
 /**
@@ -37,12 +38,12 @@ public final class StringUtils {
     }
 
     /**
-     * Returns whether the given string contains any of the provided elements.
+     * Return whether the given string contains any of the provided elements.
      *
-     * @param str    the string to analyze
-     * @param pieces the items to check the string for
+     * @param str    The string to analyze
+     * @param pieces The items to check the string for
      *
-     * @return true if the string contains at least one of the items
+     * @return True if the string contains at least one of the items
      */
     public static boolean containsAny(String str, String... pieces) {
         if (str == null) {
@@ -60,21 +61,21 @@ public final class StringUtils {
      * Null-safe method for checking whether a string is empty. Note that the string
      * is trimmed, so this method also considers a string with whitespace as empty.
      *
-     * @param str the string to verify
+     * @param str The string to verify
      *
-     * @return true if the string is empty, false otherwise
+     * @return True if the string is empty, false otherwise
      */
     public static boolean isEmpty(String str) {
         return str == null || str.trim().isEmpty();
     }
 
     /**
-     * Joins a list of elements into a single string with the specified delimiter.
+     * Join a list of elements into a single string with the specified delimiter.
      *
-     * @param delimiter the delimiter to use
-     * @param elements  the elements to join
+     * @param delimiter The delimiter to use
+     * @param elements  The elements to join
      *
-     * @return a new String that is composed of the elements separated by the delimiter
+     * @return A new String that is composed of the elements separated by the delimiter
      */
     public static String join(String delimiter, Iterable<String> elements) {
         if (delimiter == null) {
@@ -95,12 +96,12 @@ public final class StringUtils {
     }
 
     /**
-     * Joins a list of elements into a single string with the specified delimiter.
+     * Join a list of elements into a single string with the specified delimiter.
      *
-     * @param delimiter the delimiter to use
-     * @param elements  the elements to join
+     * @param delimiter The delimiter to use
+     * @param elements  The elements to join
      *
-     * @return a new String that is composed of the elements separated by the delimiter
+     * @return A new String that is composed of the elements separated by the delimiter
      */
     public static String join(String delimiter, String... elements) {
         return join(delimiter, Arrays.asList(elements));
@@ -117,4 +118,15 @@ public final class StringUtils {
         return "[" + th.getClass().getSimpleName() + "]: " + th.getMessage();
     }
 
+    /**
+     * Construct a file path from the given elements, i.e. separate the given elements by the file separator.
+     *
+     * @param elements The elements to create a path with
+     *
+     * @return The created path
+     */
+    public static String makePath(String... elements) {
+        return join(File.separator, elements);
+    }
+
 }