Make it smarter

.travis.yml

@@ -1,9 +1,30 @@
-language: java
-jdk:
-  - oraclejdk8
-
-sudo: false
-
-cache:
-  directories:
-  - $HOME/.m2
+{
+  "language": "java",
+  "jdk": "oraclejdk8",
+  "git": {
+    "depth": 100
+  },
+  "sudo": false,
+  "addons": {
+    "apt": {
+      "packages": [
+        "oracle-java8-installer"
+      ]
+    }
+  },
+  "before_install": [
+    "wget https://archive.apache.org/dist/maven/maven-3/3.3.9/binaries/apache-maven-3.3.9-bin.zip",
+    "unzip -qq apache-maven-3.3.9-bin.zip",
+    "export M2_HOME=$PWD/apache-maven-3.3.9",
+    "export PATH=$M2_HOME/bin:$PATH"
+  ],
+  "script": "mvn -B -q clean install",
+  "cache": {
+    "directories": [
+      "$HOME/.m2"
+    ]
+  },
+  "os": "linux",
+  "group": "stable",
+  "dist": "trusty"
+}