diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index e5a2aa4..3de6082 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -15,21 +15,32 @@
 
 name: Java CI
 
-on: [push]
+on: [push, pull_request]
 
 jobs:
   build:
 
     runs-on: ubuntu-latest
+    continue-on-error: ${{ matrix.experimental }}
     strategy:
       matrix:
-        java: [ '8', '11', '15' ]
+        java: [ 8, 11, 15 ]
+        experimental: [false]
+        include:
+          - java: 16-ea
+            experimental: true        
         
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v2.3.4
+    - uses: actions/cache@v2
+      with:
+        path: ~/.m2/repository
+        key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+        restore-keys: |
+          ${{ runner.os }}-maven-
     - name: Set up JDK ${{ matrix.java }}
-      uses: actions/setup-java@v1
+      uses: actions/setup-java@v1.4.3
       with:
         java-version: ${{ matrix.java }}
     - name: Build with Maven
-      run: mvn -V clean test package
+      run: mvn -V -Ddoclint=all --file pom.xml --no-transfer-progress
diff --git a/.travis.yml b/.travis.yml
index b39a4be..cc26727 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,7 +14,6 @@
 # limitations under the License.
 
 language: java
-sudo: false
 
 cache:
   directories:
@@ -23,6 +22,12 @@
 jdk:
   - openjdk8
   - openjdk11
+  - openjdk15
+  - openjdk-ea
+
+matrix:
+  allow_failures:
+    - jdk: openjdk-ea
 
 script:
-  - mvn -V -B clean test
+  - mvn -V --no-transfer-progress
diff --git a/pom.xml b/pom.xml
index 6905515..2a6be2c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -219,6 +219,8 @@
   </dependencies>
 
   <build>
+    <!-- TODO SpotBugs, Checkstyle -->
+    <defaultGoal>clean package javadoc:javadoc</defaultGoal>
     <plugins>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>