changes in the pom.xml:

- added an configuration for the maven-compiler-plugin
- added project.build.sourceEncoding
- added the dependency for the tools.jar

pom.xml

@@ -20,6 +20,10 @@
     </license>
   </licenses>
 
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
   <scm>
     <url>https://github.com/dspinellis/UMLGraph/</url>
     <connection>scm:git://github.com/dspinellis/UMLGraph.git</connection>
@@ -34,7 +38,15 @@
     </developer>
   </developers>
 
-  <dependencies/>
+  <dependencies>
+    <dependency>
+      <groupId>sun.jdk</groupId>
+      <artifactId>tools</artifactId>
+      <version>1.5.0</version>
+      <scope>system</scope>
+      <systemPath>${java.home}/../lib/tools.jar</systemPath>
+    </dependency>
+  </dependencies>
 
   <build>
     <resources>
@@ -45,6 +57,13 @@
     </resources>
     <plugins>
       <plugin>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>2.3.2</version>
+        <configuration>
+          <source>1.5</source>
+          <target>1.5</target>
+        </configuration>
+      </plugin>      <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-jar-plugin</artifactId>
         <configuration>