Solved issue #1 and started working on db structure.

src/de/katho/kBorrow/Settings.java

@@ -82,7 +82,6 @@ public class Settings {
 			System.out.println("I couldn't find the specified properties file while trying to create a default config.");
 			e.printStackTrace();
 		} catch (IOException e) {
-			System.out.println(this.filePath);
 			System.out.println("I had problems, writing to the properties file while trying to create a default config.");
 			e.printStackTrace();
 		}		
@@ -94,5 +93,19 @@ public class Settings {
 	
 	public void setProperty(String pKey, String pValue){
 		this.properties.put(pKey, pValue);
+		
+		OutputStream os;
+		try {
+			os = new FileOutputStream(this.filePath+"/"+this.fileName);
+			this.properties.store(os, null);
+			
+			os.close();
+		} catch (FileNotFoundException e) {
+			System.out.println("I couldn't find the specified properties file while trying to write the config.");
+			e.printStackTrace();
+		} catch (IOException e) {
+			System.out.println("I had problems, writing to the properties file while saving a setting.");
+			e.printStackTrace();
+		}		
 	}
 }

src/de/katho/kBorrow/db/sqlite_init.sql

@@ -0,0 +1,30 @@
+CREATE TABLE article (
+	id INTEGER PRIMARY KEY,
+	name TEXT NOT NULL,
+	description TEXT
+);
+
+CREATE TABLE lender (
+	id INTEGER PRIMARY KEY,
+	name TEXT,
+	surname TEXT,
+	student_number INT,
+	comment TEXT
+);
+
+CREATE TABLE user (
+	id INTEGER PRIMARY KEY,
+	name TEXT,
+	surname TEXT
+);
+
+CREATE TABLE lending (
+	id INTEGER PRIMARY KEY,
+	article_id INT,
+	user_id INT,
+	lender_id INT,
+	start_date DATE DEFAULT current_date,
+	expected_end_date DATE,
+	end_date DATE,
+	comment
+);