Add missing test resources

Change-Id: I18dce6f191dee6c9784e250c1ac116899b5dedcd
diff --git a/src/test/resources/simple_2gram.freq b/src/test/resources/simple_2gram.freq
new file mode 100644
index 0000000..8494a56
--- /dev/null
+++ b/src/test/resources/simple_2gram.freq
@@ -0,0 +1,8 @@
+alex	.	2
+alex	bin	1
+bin	alex	1
+bin	ich	1
+heiße	alex	1
+ich	.	1
+ich	bin	1
+ich	heiße	1