Fixed #250 - UTF-8 for json import to sqlite

BudgetMasterCore/src/main/java/de/deadlocker8/budgetmaster/logic/serverconnection/ServerConnection.java

@@ -3,9 +3,11 @@ package de.deadlocker8.budgetmaster.logic.serverconnection;
 import java.io.BufferedReader;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.io.OutputStreamWriter;
 import java.io.PrintWriter;
 import java.lang.reflect.Type;
 import java.net.URL;
+import java.nio.charset.StandardCharsets;
 import java.security.cert.X509Certificate;
 import java.util.ArrayList;
 
@@ -492,7 +494,7 @@ public class ServerConnection
 		httpsCon.setRequestProperty("Accept", "application/json");		
 		httpsCon.setDoInput(true);
 		httpsCon.setDoOutput(true);
-		PrintWriter writer = new PrintWriter(httpsCon.getOutputStream());
+		PrintWriter writer = new PrintWriter(new OutputStreamWriter(httpsCon.getOutputStream(), StandardCharsets.UTF_8));
 		writer.write(databaseJSON);
 		writer.flush();
 		writer.close();