check java version range (#523)

The version 1.8.0_25 is know to be incompatible with our code base.
Java > 1.8 should not work with our currently used Xtext version.

Related to: https://github.com/openhab/openhab-core/issues/522

Signed-off-by: Markus Rathgeb <maggu2810@gmail.com>

pom.xml

@@ -312,6 +312,12 @@ Import-Package: \\
           <version>2.8.2</version>
         </plugin>
 
+        <plugin>
+          <groupId>org.apache.maven.plugins</groupId>
+          <artifactId>maven-enforcer-plugin</artifactId>
+          <version>3.0.0-M2</version>
+        </plugin>
+
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-install-plugin</artifactId>
@@ -536,6 +542,27 @@ Import-Package: \\
       </plugins>
     </pluginManagement>
 
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-enforcer-plugin</artifactId>
+        <executions>
+          <execution>
+            <id>enforce-java</id>
+            <goals>
+              <goal>enforce</goal>
+            </goals>
+            <configuration>
+              <rules>
+                <requireJavaVersion>
+                  <version>[1.8.0-40,1.9)</version>
+                </requireJavaVersion>
+              </rules>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
   </build>
 
   <profiles>