helper class for task callbacks

diff --git a/app/src/main/java/net/ktnx/mobileledger/TaskCallback.java b/app/src/main/java/net/ktnx/mobileledger/TaskCallback.java
new file mode 100644 (file)
index 0000000..cf0603f
--- /dev/null
+++ b/app/src/main/java/net/ktnx/mobileledger/TaskCallback.java
@@ -0,0 +1,5 @@
+package net.ktnx.mobileledger;
+
+interface TaskCallback {
+    abstract void done();
+}