it compiles (but doesn't do anything useful)

src/InputReader.h

@@ -0,0 +1,29 @@
+// See the file "COPYING" in the main distribution directory for copyright.
+// 
+// Same notes about thread safety as in LogWriter.h apply.
+
+
+#ifndef INPUTREADER_H
+#define INPUTREADER_H
+
+class InputReader {
+public:
+    InputReader();
+    virtual ~InputReader();
+    
+protected:
+    // Methods that have to be overwritten by the individual readers
+    
+private:
+    friend class InputMgr;
+    
+    // When an error occurs, this method is called to set a flag marking the 
+    // writer as disabled.
+    
+    bool disabled;
+    
+    bool Disabled() { return disabled; }
+};
+
+
+#endif /* INPUTREADER_H */