[FEATURE] Added Directories#listFilesWithExtension

src/main/java/org/parabot/core/Directories.java

@@ -304,4 +304,23 @@ public class Directories {
             Core.verbose("File is deleted : " + file.getAbsolutePath());
         }
     }
+
+    /**
+     * Returns an array of files with from a given directory and a given extension
+     *
+     * @param directory The directory where should be searched
+     * @param extension The extension to be searched for, including the dot (like .json)
+     * @return An array of of files that match the request
+     */
+    private File[] listFilesWithExtension(File directory, final String extension){
+        return directory.listFiles(new FilenameFilter() {
+            public boolean accept(File dir, String filename) {
+                return filename.endsWith(extension);
+            }
+        });
+    }
+
+    private File[] listJSONFiles(File directory) {
+        return listFilesWithExtension(directory, ".json");
+    }
 }

src/main/java/org/parabot/core/parsers/servers/LocalServers.java

@@ -1,5 +1,7 @@
 package org.parabot.core.parsers.servers;
 
+import java.io.File;
+import java.io.FilenameFilter;
 import java.lang.reflect.Constructor;
 import java.util.ArrayList;
 
@@ -64,7 +66,7 @@ public class LocalServers extends ServerParser {
             }
         }
 
-//        for ()
+
     }
 
 }