1 files changed, 21 insertions, 0 deletions
diff --git a/src/main/java/design/persistence/LeagueDatabase.java b/src/main/java/design/persistence/LeagueDatabase.java
new file mode 100644
index 0000000..953624d
--- /dev/null
+++ b/src/main/java/design/persistence/LeagueDatabase.java
@@ -0,0 +1,21 @@
+package design.persistence;
+
+import design.model.League;
+
+import java.io.IOException;
+
+public interface LeagueDatabase {
+    static LeagueDatabase instance() {
+        return JSONLeagueDatabase.instance();
+    }
+
+    League getLeague(int id);
+
+    League[] getLeagues();
+
+    void addLeague(League league) throws IOException;
+
+    void removeLeague(League league) throws IOException;
+
+    void updateLeague(League league) throws IOException;
+}