Performed some minor code cleanup

src/token/Eof.java

@@ -14,15 +14,15 @@ public class Eof extends Token {
 
     @Override
     public SExpression parseSExpression(Supplier<Token> getNextToken) {
-        throw new EofEncounteredException(this);
+        throw new EofEncounteredException(getPosition());
     }
 
     public static class EofEncounteredException extends LineColumnException {
 
         private static final long serialVersionUID = 1L;
 
-        public EofEncounteredException(Token token) {
-            super(token.getPosition());
+        public EofEncounteredException(FilePosition position) {
+            super(position);
         }
 
         public String getMessagePrefix() {

src/token/RightParenthesis.java

@@ -15,7 +15,7 @@ public class RightParenthesis extends Token {
 
     @Override
     public SExpression parseSExpression(Supplier<Token> getNextToken) {
-        throw new StartsWithRightParenthesisException(this);
+        throw new StartsWithRightParenthesisException(getPosition());
     }
 
     @Override
@@ -27,12 +27,12 @@ public class RightParenthesis extends Token {
 
         private static final long serialVersionUID = 1L;
 
-        public StartsWithRightParenthesisException(Token token) {
-            super(token.getPosition());
+        public StartsWithRightParenthesisException(FilePosition position) {
+            super(position);
         }
 
         public String getMessagePrefix() {
-            return "Expression begins with ')'";
+            return "expression begins with ')'";
         }
     }
 

src/token/Token.java

@@ -27,18 +27,6 @@ public abstract class Token {
         return position;
     }
 
-    public String getFileName() {
-        return position.getFileName();
-    }
-
-    public int getLine() {
-        return position.getLineNumber();
-    }
-
-    public int getColumn() {
-        return position.getColumnNumber();
-    }
-
     // sExpr ::= NUMBER | IDENTIFIER | STRING | QUOTE_MARK sExpr | LEFT_PAREN sExprTail
     public abstract SExpression parseSExpression(Supplier<Token> getNextToken);
 

test/scanner/LispScannerLineColumnTester.java

@@ -7,6 +7,7 @@ import java.io.InputStream;
 
 import org.junit.Test;
 
+import file.FilePosition;
 import token.Token;
 
 public class LispScannerLineColumnTester {
@@ -24,8 +25,8 @@ public class LispScannerLineColumnTester {
             return lineColumn;
         }
 
-        public boolean isEqual(Token token) {
-            return (this.line == token.getLine()) && (this.column == token.getColumn());
+        public boolean isEqual(FilePosition position) {
+            return (this.line == position.getLineNumber()) && (this.column == position.getColumnNumber());
         }
     }
 
@@ -35,7 +36,7 @@ public class LispScannerLineColumnTester {
 
         for (LineColumn lineColumn : expectedLineColumnList) {
             Token nextToken = lispScanner.getNextToken();
-            assertTrue(lineColumn.isEqual(nextToken));
+            assertTrue(lineColumn.isEqual(nextToken.getPosition()));
         }
     }
 

test/scanner/LispScannerTextTester.java

@@ -7,6 +7,8 @@ import java.io.InputStream;
 
 import org.junit.Test;
 
+import file.FilePosition;
+
 public class LispScannerTextTester {
 
     private void assertTokenTextMatches(String input, String[] expectedTextList) {
@@ -31,8 +33,9 @@ public class LispScannerTextTester {
     private void assertInputFileNameMatches(String input, String expectedInputFileName) {
         InputStream stringInputStream = createInputStreamFromString(input);
         LispScanner lispScanner = new LispScanner(stringInputStream, expectedInputFileName);
+        FilePosition tokenPosition = lispScanner.getNextToken().getPosition();
 
-        assertEquals(expectedInputFileName, lispScanner.getNextToken().getFileName());
+        assertEquals(expectedInputFileName, tokenPosition.getFileName());
     }
 
     @Test