more sonar identified stuff cleaned

Author: wumpz

src/main/java/net/sf/jsqlparser/expression/InverseExpression.java

@@ -39,7 +39,7 @@ public Expression getExpression() {
 		return expression;
 	}
 
-	public void setExpression(Expression expression) {
+	public final void setExpression(Expression expression) {
 		this.expression = expression;
 	}
 

src/main/java/net/sf/jsqlparser/expression/Parenthesis.java

@@ -40,7 +40,7 @@ public Expression getExpression() {
 		return expression;
 	}
 
-	public void setExpression(Expression expression) {
+	public final void setExpression(Expression expression) {
 		this.expression = expression;
 	}
 

src/main/java/net/sf/jsqlparser/expression/operators/relational/InExpression.java

@@ -47,11 +47,11 @@ public Expression getLeftExpression() {
 		return leftExpression;
 	}
 
-	public void setRightItemsList(ItemsList list) {
+	public final void setRightItemsList(ItemsList list) {
 		rightItemsList = list;
 	}
 
-	public void setLeftExpression(Expression expression) {
+	public final void setLeftExpression(Expression expression) {
 		leftExpression = expression;
 	}
 

src/main/java/net/sf/jsqlparser/parser/CCJSqlParserUtil.java

@@ -69,4 +69,7 @@ public static Statement parse(InputStream is, String encoding) throws JSQLParser
 			throw new JSQLParserException(ex);
 		} 
 	}
+
+	private CCJSqlParserUtil() {
+	}
 }