Exact picture seems to work

api/src/main/java/ch/gtache/fro/FetcherConfiguration.java

@@ -0,0 +1,35 @@
+package ch.gtache.fro;
+
+import java.nio.file.Path;
+import java.time.Duration;
+
+public interface FetcherConfiguration {
+
+    /**
+     * Returns the root folder where the data is stored
+     *
+     * @return The root folder
+     */
+    Path rootFolder();
+
+    /**
+     * Sets the root folder where the data is stored
+     *
+     * @param rootFolder The root folder
+     */
+    void setRootFolder(final Path rootFolder);
+
+    /**
+     * Returns the duration to wait between two fetches
+     *
+     * @return The duration
+     */
+    Duration waitBetweenFetch();
+
+    /**
+     * Sets the duration to wait between two fetches
+     *
+     * @param waitBetweenFetch The duration
+     */
+    void setWaitBetweenFetch(final Duration waitBetweenFetch);
+}