Hash Table insertion linear probinig
You do not have to initialize string array with "". By default array values will be initialized with null. So afterwards, you can check if (store[index] == null).
You are already doing '%' operation in for loop, no need to check if(index == 10)
String array is not required at all as mentioned by @kraskevich. But if you do need, make it as a property of class LinearProbbing. So that you do not have to pass it within methods. 
No actual implementation of Hash is involved. So better rename methods.