add codecov plugin

.travis.yml

@@ -1,5 +1,7 @@
 language: java
 jdk:
+  - oraclejdk7
+  - openjdk7
   - oraclejdk8
 before_install:
   - pip install --user codecov

pom.xml

@@ -310,6 +310,41 @@
 				</dependency>
 			</dependencies>
 		</profile>
+		<profile>
+			<id>travis</id>
+			<activation>
+				<property>
+					<name>env.TRAVIS</name>
+					<value>true</value>
+				</property>
+			</activation>
+			<build>
+				<plugins>
+					<plugin>
+						<!-- for codecov.io -->
+						<!-- config example: https://github.com/codecov/example-java -->
+						<!-- plugin docs: http://eclemma.org/jacoco/trunk/doc/ -->
+						<groupId>org.jacoco</groupId>
+						<artifactId>jacoco-maven-plugin</artifactId>
+						<version>0.7.6.201602180812</version>
+						<executions>
+							<execution>
+								<goals>
+									<goal>prepare-agent</goal>
+								</goals>
+							</execution>
+							<execution>
+								<id>report</id>
+								<phase>test</phase>
+								<goals>
+									<goal>report</goal>
+								</goals>
+							</execution>
+						</executions>
+					</plugin>
+				</plugins>
+			</build>
+		</profile>
 	</profiles>
 
 	<dependencies>