Use a variable for Java version

Author: kinow

pom.xml

@@ -60,6 +60,7 @@
 		<sonar.java.coveragePlugin>jacoco</sonar.java.coveragePlugin>
 		<sonar.dynamicAnalysis>reuseReports</sonar.dynamicAnalysis>
 		<sonar.language>java</sonar.language>
+        <java.version>1.8</java.version>
 	</properties>
 
 	<developers>
@@ -118,8 +119,8 @@
 				<artifactId>maven-compiler-plugin</artifactId>
 				<version>2.3.2</version>
 				<configuration>
-					<source>1.8</source>
-					<target>1.8</target>
+					<source>${java.version}</source>
+					<target>${java.version}</target>
 				</configuration>
 			</plugin>
 			<!-- Coverage -->