Add TravisCI configuration.

Author: mattbertolini

.editorconfig

@@ -21,4 +21,8 @@ trim_trailing_whitespace = true
 [*.md]
 indent_size = 4
 indent_style = space
-trim_trailing_whitespace = false
+trim_trailing_whitespace = false
+
+[*.{yml,yaml}]
+indent_style = space
+indent_size = 2

.travis.yml

@@ -0,0 +1,5 @@
+language: java
+
+jdk:
+  - openjdk8
+  - openjdk11