Cleanup fetching/writing.

src/main/java/com/kgshape/app/Query.java

@@ -13,12 +13,13 @@ import org.apache.logging.log4j.core.config.DefaultConfiguration;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
+import java.nio.file.FileSystemNotFoundException;
 
 /**
- * See: https://jena.apache.org/documentation/query/app_api.html
+ * Queries a remote endpoint.
  */
 public class Query {
-    public static void main(String[] args) {
+    public static void main(String[] args) throws IOException {
         // https://stackoverflow.com/questions/41442024/basicconfigurator-replacement-in-log4j2
         Configurator.initialize(new DefaultConfiguration());
         Configurator.setRootLevel(Level.INFO);
@@ -45,23 +46,27 @@ public class Query {
         // You can also open this endpoint in the browser and test the above query
         String endpoint = "https://dbpedia.org/sparql";
 
+        Model fetchedModel = fetchConstruct(endpoint, construct_query);
+        writeModel(fetchedModel, "rdf_file.ttl");
+    }
+
+    public static Model fetchConstruct(String endpoint, String query) {
         // https://jena.apache.org/documentation/query/sparql-remote.html
-        QueryExecution qexec = QueryExecutionFactory.sparqlService(endpoint, construct_query);
+        // Also see: https://jena.apache.org/documentation/query/app_api.html
+        QueryExecution qexec = QueryExecutionFactory.sparqlService(endpoint, query);
         Model resultModel = qexec.execConstruct();
+        qexec.close();
+        return resultModel;
+    }
 
-//        RDFDataMgr.write(System.out, resultModel, Lang.TURTLE);
+    public static void writeModel(Model model, String filename) throws FileSystemNotFoundException, IOException {
+//        RDFDataMgr.write(System.out, resultModel, Lang.TURTLE); // Write it to stdout
 
-        try (FileOutputStream fos = new FileOutputStream("rdf.ttl")) {
+        try (FileOutputStream fos = new FileOutputStream(filename)) {
             // See: https://jena.apache.org/documentation/io/rdf-output.html#opt-turtle-trig
-            RDFDataMgr.write(fos, resultModel, Lang.TURTLE);
-        } catch (FileNotFoundException e) {
-            e.printStackTrace();
-        } catch (IOException e) {
-            e.printStackTrace();
+            RDFDataMgr.write(fos, model, Lang.TURTLE);
+        } catch (Exception e) {
+            throw e;
         }
-
-        qexec.close();
-
-        System.out.println("Hello Query!");
     }
 }