diff --git a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Cell.java b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Cell.java
index ecbb637..bd35416 100644
--- a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Cell.java
+++ b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Cell.java
@@ -9,28 +9,52 @@ package de.hs_mannheim.informatik.spreadsheet;
 public class Cell {
     private String formula = "";
     private String value = "";
-    
+
+    /**
+     * Public method to get the formula of the cell.
+     * @return formula of the cell.
+     */
     public String getFormula() {
         return formula;
     }
-    
+
+    /**
+     * Public method to set the formula of the cell.
+     * @param formula formula of the cell.
+     */
     public void setFormula(String formula) {
         if (!formula.isEmpty())
             this.formula = formula.toUpperCase().substring(1);  // removes '=' at the beginning
     }
-    
+
+    /**
+     * Public method to get the value of the cell.
+     * @return value of the cell
+     */
     public String getValue() {
         return value;
     }
-    
+
+    /**
+     * Public method to set the value of the cell.
+     * @param value value of the cell.
+     */
     public void setValue(String value) {
         this.value = value;
     }
-    
+
+    /**
+     * Public method to get cell value as a string.
+     * @return value as string.
+     */
     public String toString() {
         return String.format("%4s", value);
     }
-    
+
+    /**
+     * Public method to check if the cell is empty.
+     * @return true if the cell is empty, false otherwise.
+     */
     public boolean isEmpty() {
         return value.isEmpty();
     }
diff --git a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
index 6f6ec43..c46eeb4 100644
--- a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
+++ b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
@@ -45,15 +45,33 @@ public class Spreadsheet {
 	// -----
 	// retrieve or change values of cells
 
+	/**
+	 * Private method to get a value from a cell in a spreadsheet.
+	 * @param row The row of the cell.
+	 * @param col The column of the cell.
+	 * @return The value of the cell.
+	 */
 	private String get(int row, int col) {
 		return cells[row][col].getValue();
 	}
 
+	/**
+	 * Public method to get a value from a cell in a spreadsheet.
+	 * @param cellName The name of the cell.
+	 * @return The value of the cell.
+	 */
 	public String get(String cellName) {
 		cellName = cellName.toUpperCase();
 		return get(getRow(cellName), getCol(cellName));
 	}
 
+	/**
+	 * Private methode to put a value into a cell in a spreadsheet.
+	 * @param row The row of the cell.
+	 * @param col The column of the cell.
+	 * @param value The value to put into the cell.
+	 * @return Nothing.
+	 */
 	private void put(int row, int col, String value) {
 		if (!value.startsWith("="))
 			cells[row][col].setValue(value);
@@ -64,15 +82,32 @@ public class Spreadsheet {
 		}
 	}
 
+	/**
+	 * Public method to put a value into a cell in a spreadsheet.
+	 * Calls private methode put.
+	 * @param cellName The name of the cell.
+	 * @param value The value to put into the cell.
+	 * @return Nothing.
+	 */
 	public void put(String cellName, String value) {
 		cellName = cellName.toUpperCase();
 		put(getRow(cellName), getCol(cellName), value);
 	}
 
+	/**
+	 * Method to get the column of a cell in a spreadsheet.
+	 * @param cellName The name of the cell.
+	 * @return The column of the cell.
+	 */
 	public int getCol(String cellName) {
 		return cellName.charAt(0) - 'A';
 	}
 
+	/**
+	 * Method to get the row of a cell in a spreadsheet.
+	 * @param cellName The name of the cell.
+	 * @return The row of the cell.
+	 */
 	public int getRow(String cellName) {
 		String row = "";
 		for (int i = 1; i < cellName.length(); i++){
@@ -428,6 +463,7 @@ public class Spreadsheet {
 	}
 
 	/**
+	 *
 	 * This method calculates the result of a "normal" algebraic expression. It only needs to support
 	 * expressions like =B4 or =2+A3-B2, i.e. only with int numbers and other cells and with plus,
 	 * minus, times, split only. An expression always starts with either a number or a cell name. If it 
@@ -546,14 +582,26 @@ public class Spreadsheet {
 
 	// -----
 
+	/**
+	 * Returns the number of rows in the spreadsheet.
+	 * @return amount rows.
+	 */
 	public int getRowsLCount() {
 		return cells.length;
 	}
 
+	/**
+	 * Returns the number of columns in the spreadsheet.
+	 * @return amount columns.
+	 */
 	public int getColsCount() {
 		return cells[0].length;
 	}
 
+	/**
+	 * Clears the spreadsheet, it fills every value and formula to zero.
+	 * @return Nothing.
+	 */
 	public void clearTable() {
 		int rows = getRowsLCount();
 		int cols = getColsCount();
@@ -561,10 +609,15 @@ public class Spreadsheet {
 		for (int r = 0; r < rows; r++) {
 			for (int c = 0; c < cols; c++) {
 				cells[r][c].setValue("");
+				cells[r][c].setFormula("");
 			}
 		}
 	}
 
+	/**
+	 * Loads a special table for testing purposes.
+	 * @return Nothing.
+	 */
 	public void loadSpecialTable(){
 		clearTable();
 
@@ -585,6 +638,10 @@ public class Spreadsheet {
 		put("G5", "3");
 	}
 
+	/**
+	 * Returns a string representation of the spreadsheet.
+	 * @return The spreadsheet as a string.
+	 */
 	public String toString() {
 		StringBuilder sb = new StringBuilder();