adding magic to travis commands

Author: valgog

.travis.yml

@@ -1,8 +1,10 @@
 language: java
+
 jdk:
     - openjdk7
     - oraclejdk7
     - oraclejdk8
+
 addons:
     postgresql: "9.5"
 
@@ -12,7 +14,7 @@ sudo: false
 # stop mvn install from running
 install: true
 
-script: mvn -B -V package javadoc:javadoc test
+script: mvn -B -V package $( [[ "$TRAVIS_JDK_VERSION" == "oraclejdk8" ]] && echo javadoc:javadoc ) test
 
 after_success:
     - mvn -B -V clean test jacoco:report coveralls:report

pom.xml

@@ -82,11 +82,6 @@
                 <artifactId>maven-resources-plugin</artifactId>
                 <version>3.0.1</version>
             </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-plugin-plugin</artifactId>
-                <version>3.4</version>
-            </plugin>
             <plugin>
                 <groupId>org.eluder.coveralls</groupId>
                 <artifactId>coveralls-maven-plugin</artifactId>