implement custom file extensions and directories with appropriate tests, vbump to 1.0.4

omega-config-base/src/main/java/draylar/omegaconfig/OmegaConfig.java

@@ -147,7 +147,9 @@ public class OmegaConfig {
         lines.forEach(str -> res.append(String.format("%s%n", str)));
 
         try {
-            Files.write(getConfigPath(instance), res.toString().getBytes());
+            Path configPath = getConfigPath(instance);
+            configPath.toFile().getParentFile().mkdirs();
+            Files.write(configPath, res.toString().getBytes());
         } catch (IOException ioException) {
             LOGGER.error(ioException);
             LOGGER.info(String.format("Write error, using default values for config %s.", configClass.toString()));
@@ -199,7 +201,7 @@ public class OmegaConfig {
     }
 
     public static Path getConfigPath(Config config) {
-        return Paths.get(FabricLoader.getInstance().getConfigDir().toString(), String.format("%s.json", config.getName()));
+        return Paths.get(FabricLoader.getInstance().getConfigDir().toString(), config.getDirectory(), String.format("%s.%s", config.getName(), config.getExtension()));
     }
 
     public static boolean configExists(Config config) {

omega-config-base/src/main/java/draylar/omegaconfig/api/Config.java

@@ -78,7 +78,33 @@ public interface Config {
         return null;
     }
 
-    default boolean hasMenu() {
-        return true;
+    /**
+     * Returns the file extension of this config.
+     *
+     * <p>
+     * The file extension is used while serializing this config to a local file.
+     * The primary use-case of switching this would be supporting existing config files
+     *      when porting from other json5 config libraries.
+     *
+     * @return  the file extension of this config
+     */
+    default String getExtension() {
+        return "json";
+    }
+
+    /**
+     * Returns the directory of this config, assuming the base directory is the instance config directory.
+     *
+     * <p>
+     * By default, a config such as 'my_config' will appear at /config/my_config.json.
+     * If this method specifies a directory, such as 'configurations',
+     *      the config file will appear at /config/configurations/my_config.json.
+     *
+     * Nested directories can be specified by using a string such as 'configurations/client'.
+     *
+     * @return  the directory of this config
+     */
+    default String getDirectory() {
+        return "";
     }
 }