fix build warnings

Change-Id: I713a5f117dc660550684338f162582089a5d3403
Reviewed-on: http://fulliautomatix.ics.uci.edu:8443/118
Reviewed-by: Inci Cetindil <icetindil@gmail.com>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
diff --git a/asterix-events/pom.xml b/asterix-events/pom.xml
index 300646e..adfa543 100644
--- a/asterix-events/pom.xml
+++ b/asterix-events/pom.xml
@@ -28,15 +28,16 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-compiler-plugin</artifactId>
-				<version>2.0.2</version>
+				<version>2.3.2</version>
 				<configuration>
-					<source>1.6</source>
-					<target>1.6</target>
+					<source>1.7</source>
+					<target>1.7</target>
 				</configuration>
 			</plugin>
 			<plugin>
 				<groupId>org.jvnet.jaxb2.maven2</groupId>
 				<artifactId>maven-jaxb2-plugin</artifactId>
+				<version>0.9.0</version>
 				<executions>
 					<execution>
 						<id>event</id>