Improve documentation.

README.md

@@ -4,15 +4,16 @@ The Controller's Application receives requests coming from the [Workers](https:/
 Then, it receives the "WorkerReports", it requests the full-texts from the workers, in batches, and uploads them on the S3-Object-Store. Finally, it writes the related reports, along with the updated file-locations into the database.<br> 
 The database used is the [Impala](https://impala.apache.org/).<br>
 <br>
-Statistics API:
+
+**Statistics API**:
 - "**getNumberOfPayloads**" endpoint: **http://IP:PORT/api/stats/getNumberOfPayloads**
 - "**getNumberOfRecordsInspected**" endpoint: **http://IP:PORT/api/stats/getNumberOfRecordsInspected**
 <br>
-
 <br>
-To install and run the application:
+
+**To install and run the application**:
 - Run ```git clone``` and then ```cd UrlsController```.
-- Provide the **S3 Object Store** related configurations, inside the *src/main/resources/application.properties* file.<br>
+- Set the preferable values inside the [__application.properties__](https://code-repo.d4science.org/lsmyrnaios/UrlsWorker/src/branch/master/src/main/resources/application.properties) file.
 - Execute the ```installAndRun.sh``` script which builds and runs the app.<br>
 If you want to just run the app, then run the script with the argument "1": ```./installAndRun.sh 1```.<br>
 If you want to build and run the app on a **Docker Container**, then run the script with the argument "0" followed by the argument "1": ```./installAndRun.sh 0 1```.<br>

src/main/java/eu/openaire/urls_controller/util/ParquetFileUtils.java

@@ -402,7 +402,7 @@ public class ParquetFileUtils {
             // Write the parquet file.
             try ( InputStream inputS = Files.newInputStream(parquetFile.toPath()); OutputStream outS = conn.getOutputStream()) {
                 int readByte = -1;  while ( (readByte = inputS.read()) != -1 )  outS.write(readByte);
-            }
+            }   // Any exception will be caught in the end of this method.
 
             statusCode = conn.getResponseCode();
             if ( statusCode != 201 ) {