Merge pull request eclipse#418 from nikhilnanivadekar/master

Upgrade Maven plugins, add a Java 9 build on Travis.

.travis.yml

@@ -5,6 +5,7 @@ addons:
   apt:
     packages:
       - oracle-java8-installer
+      - oracle-java9-installer
 
 before_install:
   - wget https://archive.apache.org/dist/maven/maven-3/3.5.0/binaries/apache-maven-3.5.0-bin.zip
@@ -44,6 +45,11 @@ matrix:
         - DESC="compile jmh-tests and performance-tests"
         - CMD="mvn install --projects jmh-tests,performance-tests --also-make --activate-profiles all -DskipTests=true --batch-mode --show-version --errors"
 
+    - jdk: oraclejdk9
+      env:
+        - DESC="unit tests Java 9"
+        - CMD="mvn install --projects '!scala-unit-tests,!jmh-scala-tests,!jmh-tests,!p2-repository' --batch-mode --show-version --errors"
+
 script: eval travis_wait 35 $CMD
 
 cache:

pom.xml

@@ -233,7 +233,7 @@
 
                 <plugin>
                     <artifactId>maven-javadoc-plugin</artifactId>
-                    <version>2.10.4</version>
+                    <version>3.0.0-M1</version>
                 </plugin>
 
                 <plugin>
@@ -271,7 +271,7 @@
 
                 <plugin>
                     <artifactId>maven-enforcer-plugin</artifactId>
-                    <version>1.4.1</version>
+                    <version>3.0.0-M1</version>
                     <executions>
                         <execution>
                             <id>enforce</id>
@@ -311,7 +311,7 @@
                     <artifactId>clirr-maven-plugin</artifactId>
                     <version>2.7</version>
                 </plugin>
-                
+
                 <plugin>
                     <groupId>net.alchim31.maven</groupId>
                     <artifactId>scala-maven-plugin</artifactId>